Namespace: Autodesk.Revit.DB

Autodesk.Revit.DB Namespace

Autodesk.Revit.DB Namespace Members:

Name	Description
ACADExportOptions	The base class for options used to export DWG and DXF format files.
AdaptiveComponentFamilyUtils	An interface for Adaptive Component Instances.
AdaptiveComponentInstanceUtils	An interface for Adaptive Component Instances.
AddInId	Identifies an AddIn registered with Revit
AlphanumericRevisionSettings	Contains settings that apply to Revisions with the Alphanumeric RevisionNumberType.
AngularDimension	An object that represents an Angular Dimension within the Revit project.
AnnotationMultipleAlignmentUtils	A helper providing functionality related to elements that can be aligned to one another. An element that wants to be able to align to other alignable elements using the Multiple Alignment buttons should implement this helper class.
AnnotationSymbol	This object represents a symbol of the Generic Annotation.
AnnotationSymbolType	An object that represents an annotation style.
APIObject	Supports all objects in the Autodesk Revit API hierarchy.
AppearanceAssetElement	An element that contains a rendering asset used as a portion of a material definition.
Arc	A circular arc.
ArcLengthDimension	An object that represents an ArcLengthDimension within the Revit Project.
Area	Provides access to the area topology in Autodesk Revit.
AreaFilter	A filter used to match areas.
AreaScheme	The area scheme associated with a particular area plan.
AreaTag	Provides access to the area topology in Autodesk Revit.
AreaTagFilter	A filter used to match area tags.
AreaTagType	An object that represents an Area Tag style.
AreaVolumeSettings	This class provides access to settings related to volume and area computations.
AssemblyCodeTable	AssemblyCodeTable represents the collection of ClassificationEntries for a document.
AssemblyDifference	Class that describes difference between two assemblies.
AssemblyDifferenceConfiguration	The two assemblies being compared have different spatial configuration
AssemblyDifferenceMemberCount	The two assemblies being compared have different number of members
AssemblyDifferenceMemberDifference	The two assemblies being compared have different members
AssemblyDifferenceNamingCategory	The two assemblies being compared have different naming categories
AssemblyDifferenceNone	The two assemblies being compared are identical
AssemblyInstance	Combines multiple elements for tagging, filtering, scheduling and creating isolated assembly views.
AssemblyMemberDifference	Class that describes difference between two assembly members
AssemblyMemberDifferentCategory	The two assembly members being compared have different category
AssemblyMemberDifferentGeometry	The two assembly members being compared have different geometry
AssemblyMemberDifferentParameters	The two assembly members being compared have different parameters
AssemblyMemberDifferentType	The two assembly members being compared have different type
AssemblyType	Type for construction assembly elements.
AssemblyViewUtils	Utilities that provide capabilities related to assembly view creation and validation.
AXMImportOptions	The import options used to import AXM format files.
BackgroundSettings	Represents the rendering background settings.
BarTypeDiameterOptions	This class stores the diameter information from the RebarBarType.
BaseArray	An abstract base class that represents an array within the Revit project.
BaseExportOptions	The base class for options used to export DWG, DXF and DGN format files.
BaseImportOptions	A base class containing import options used during import of several formats.
BasePoint	A class representing the Project Base Point and Survey Point. Each Revit project contains one project base point and one survey point. The project base point represents the origin of the project coordinate system. The survey point represents the origin of the shared coordinate system.
BasicFileInfo	Encapsulates basic information about a Revit file, including worksharing status, Revit version, username and central path.
BeamSystem	An object that represents a BeamSystem within the Autodesk Revit project.
BeamSystemType	An object that specifies the type of a beam system in Autodesk Revit.
BIMExportOptions	The base class for options used to export using ATF.
Binding	Binding objects are used to take a parameter definition and bind it to one or more categories.
BindingMap	The parameters BindingMap contains all the parameter bindings that exist in the Autodesk Revit project.
Blend	A blend solid or void form.
BooleanOperationsUtils	These utilities are applicable for the geometry created by GeometryCreationUtilities and the geometry of Revit model.
BoundarySegment	An object that represents a segment of an area boundary.
BoundaryValidation	Curve loop validators.
BoundingBoxContainsPointFilter	A filter used to match elements with a bounding box that contains the given point.
BoundingBoxIntersectsFilter	A filter used to match elements with a bounding box that intersects the given Outline.
BoundingBoxIsInsideFilter	A filter used to match elements with a bounding box that is contained by the given Outline.
BoundingBoxUV	A two-dimensional rectangle, parallel to the coordinate axes.
BoundingBoxXYZ	A three-dimensional rectangular box at an arbitrary location and orientation within the Revit model.
BRepBuilder	A class that allows direct construction of geometry objects (solids, open shells, etc.).
BRepBuilderEdgeGeometry	An abstract class used by BRepBuilder to represent the geometry of an edge. Specific edge-geometry representations are represented by subclasses.
BRepBuilderGeometryId	This class is used by the BRepBuilder class to identify objects it creates (faces, edges, etc.).
BRepBuilderPersistentIds	This class stores a map from ExternalGeometryIds to BRepBuilderGeometryIds.
BRepBuilderSurfaceGeometry	An abstract class used by BRepBuilder to represent the geometry of a surface. Specific surface-geometry representations are represented by subclasses.
BrowserOrganization	The organization settings for grouping, sorting, and filtering of items in the project browser.
BuildingPadType	Represents a specific type of Building Pad.
BuiltInFailures	Provides a container of all Revit built-in FailureDefinitionId instances.
BuiltInFailures.AlignmentFailures	Failures related to alignment elements and annotations.
BuiltInFailures.AnalyticalModelFailures	Failures about AnalyticalModel.
BuiltInFailures.ArrayFailures	Failures about Arrays.
BuiltInFailures.AssemblyFailures	Failures related to Assemblies.
BuiltInFailures.AutoJoinFailures	Failures about AutoJoin.
BuiltInFailures.AutoRouteFailures	Failures about AutoRoute.
BuiltInFailures.BeamFailures	Failures about Beams.
BuiltInFailures.BeamSystemFailures	Failures about BeamSystem.
BuiltInFailures.BendFailures	Failures about Bends.
BuiltInFailures.BlendFailures	Failures about Blend.
BuiltInFailures.ColorFillFailures	Failures about ColorFill.
BuiltInFailures.ColumnFailures	Failures about Columns.
BuiltInFailures.ColumnInsideWallFailures	Failures description ColumnInsideWall
BuiltInFailures.ComponentRepeaterFailures	Failures related to component repeaters.
BuiltInFailures.ComponentRepeaterSlotFailures	Failures related to component repeater slots.
BuiltInFailures.ConnectorFailures	Failures about Connector.
BuiltInFailures.ConstraintFailures	Failures about Constraint.
BuiltInFailures.ConversionFailures	Failures about conversion of data to a different format.
BuiltInFailures.CopyMonitorFailures	Failures about CopyWatch.
BuiltInFailures.CopyPasteFailures	Failures about CopyPasteFailures.
BuiltInFailures.CreationFailures	Failures about CreationFailures.
BuiltInFailures.CurtainGridFamilyFailures	Failures about CurtainGrid Family.
BuiltInFailures.CurtainWallFailures	Failures about CurtainWall.
BuiltInFailures.CurveByPointFailures	Failures about Curve By Point Element
BuiltInFailures.CurveFailures	Failures about Curves and Curve-Driven Elements.
BuiltInFailures.CutFailures	Failures about Cut.
BuiltInFailures.CutterFailures	Failures about Cutter.
BuiltInFailures.CuttingFailures	Failures about Cutting.
BuiltInFailures.DatumPlaneFailures	Failures about DatumPlane.
BuiltInFailures.DebugTabBindingFailures	Failures related to binding framework demo panel on Ribbon Debug Tab.
BuiltInFailures.DecalFailures	Failures about Decal.
BuiltInFailures.DesignOptionFailures	Failures about DesignOptionFailures.
BuiltInFailures.DetailFailures	Failures about Detail.
BuiltInFailures.DimensionFailures	Failures about DimensionFailures.
BuiltInFailures.DirectContext3DFailures
BuiltInFailures.DirectShapeFailures	Failure definitions related to DirectShapes.
BuiltInFailures.DisplacementElementFailures	Error messages related to the DisplacementElement.
BuiltInFailures.DividedPathFailures	Failures related to divided path operations.
BuiltInFailures.DividedSurfaceFailures	Failures about DividedSurface.
BuiltInFailures.DocumentFailures	Failures about DocumentFailures.
BuiltInFailures.DPartFailures	Failures related to parts.
BuiltInFailures.DuctFailures	Failures about Duct.
BuiltInFailures.EditingFailures	Failures related to editing operations.
BuiltInFailures.ElectricalFailures	Failures about Electricity.
BuiltInFailures.ElectricityFailures	Failures related to electrical system and circuits.
BuiltInFailures.ElementFailures	Failures about Elements.
BuiltInFailures.ElementTypeFailures	Failures about ElementTypeFailures.
BuiltInFailures.ElevationFailures	Failures about Elevation.
BuiltInFailures.EnergyAnalysisFailures	Failures about EnergyAnalysis.
BuiltInFailures.EnergyAnalysisUtilitiesDBFailures	Failures about EnergyAnalysisUtilitiesDBFailures.
BuiltInFailures.ExportFailures	Failures about ExportFailures.
BuiltInFailures.ExternalResourceReferenceFailures
BuiltInFailures.ExtrusionFailures	Failures about Extrusions.
BuiltInFailures.FabricAreaFailures	Failures related to fabric area elements.
BuiltInFailures.FabricFailures	Failures about Fabric.
BuiltInFailures.FabricSheetFailures	Failures related to fabric sheet elements.
BuiltInFailures.FaceSplitterFailures	Failures about FaceSplitter.
BuiltInFailures.FamilyFailures	Failures related to families.
BuiltInFailures.FilledRegionFailures	Failures about FilledRegion.
BuiltInFailures.FloorFailures	Failures related to floors and slabs.
BuiltInFailures.FluidFailures	Failures about Fluid.
BuiltInFailures.ForeignFileFailures	Failures about files saved by applications that were not developed or licensed by Autodesk.
BuiltInFailures.FormFailures	Failures about Form.
BuiltInFailures.GeneralFailures	Failures about GeneralFailures.
BuiltInFailures.GenericFailures	Generic failures that may apply to any Revit Element
BuiltInFailures.GenericMEPFailures	Failures applicable to different mechanical, electrical and piping Elements.
BuiltInFailures.GeometryFailures	Failures about GeometryFailures.
BuiltInFailures.GlobalParameterFailures
BuiltInFailures.GridChainSketchFailures	Failures related to the GridChain sketch.
BuiltInFailures.GridFailures	Failures about Grid.
BuiltInFailures.GroupFailures	Failures related to groups and their behavior.
BuiltInFailures.HostObjFailures	Failures about HostObj.
BuiltInFailures.HvacFailures	Failures related to HVAC in MEP.
BuiltInFailures.IlluminationFailures	Failures about Illumination.
BuiltInFailures.ImageFailures	Failures about Image.
BuiltInFailures.ImportExportFailures	Failures about Import and Export.
BuiltInFailures.ImportFailures	Failures about ImportFailures.
BuiltInFailures.InaccurateFailures	Failures about Inaccurate.
BuiltInFailures.InfillFailures	Failures about Infill.
BuiltInFailures.InterferenceFailures	Failures about Interference.
BuiltInFailures.JoinElementsFailures	Failures about JoinElements.
BuiltInFailures.KeyBasedTreeEntryFailures	Failures about KeyBasedTreeEntry.
BuiltInFailures.KeyBasedTreeFileFailures	Failures occurred when reading key based tree text file.
BuiltInFailures.KeynoteFailures
BuiltInFailures.KeynoteTagFailures	Failures related to keynote tags.
BuiltInFailures.LegendFailures	Failures about Legend.
BuiltInFailures.LevelAssociationFailures	Failures about Level association of Analytical Node.
BuiltInFailures.LevelFailures	Failures about Level.
BuiltInFailures.LinkFailures	Failures about LinkFailures.
BuiltInFailures.LoadFailures	Failures about Load.
BuiltInFailures.LooseDimensionFailures	Failures about LooseDimension.
BuiltInFailures.MacroFailures	Failures about module with duplicate name found during reload latest.
BuiltInFailures.MassFailures	Failures about Mass.
BuiltInFailures.MatchlineFailures	Failures about Matchline.
BuiltInFailures.MechanicalFailures	Failures about HVAC.
BuiltInFailures.MEPCalculationFailures	Failures about Fluid.
BuiltInFailures.MEPFabricationFailures	Failures about MEP fabrication.
BuiltInFailures.MEPSupportFailures	Failures about MEP suppor.
BuiltInFailures.MirrorFailures	Failures about Mirror.
BuiltInFailures.MultiReferenceAnnotationFailures	Failures about MultiReferenceAnnotations.
BuiltInFailures.NumberingFailures	Failures related to object numbering operations.
BuiltInFailures.OffsetFacesCellLegacyFailures	Failures related to offset faces operations.
BuiltInFailures.OpeningFailures	Failures about Opening.
BuiltInFailures.OverlapFailures	Failures detected by overlap check.
BuiltInFailures.ParameterFailures	Failures related to parameters and parameter operations.
BuiltInFailures.PartMakerMethodForMergePartFailures	Failures related to part merge operations.
BuiltInFailures.PartMakerMethodForWallFailures	Failures related to parts related to walls.
BuiltInFailures.PathFailures	Failures about Path.
BuiltInFailures.PathOfTravelFailures	Failures about PathOfTravel.
BuiltInFailures.PerformanceFailures	Failures which give hints pointing to situations where performance could be improved.
BuiltInFailures.PipingFailures	Failures about Pipes.
BuiltInFailures.PlanRegionFailures	Failures about PlanRegion.
BuiltInFailures.PointFailures	Failures about Point Element.
BuiltInFailures.ProfileFailures	Failures about Profile.
BuiltInFailures.PropertySetElementFailures	Failures related to property set elements.
BuiltInFailures.RebarBendingDetailFailures	Failures concerning rebar bending details.
BuiltInFailures.RebarCouplerFailures	Failures concerning couplers
BuiltInFailures.RebarFailures	Failures about Rebar.
BuiltInFailures.RebarShapeFailures	Failures about RebarShape.
BuiltInFailures.RebarSystemFailures	Failures related to rebar systems.
BuiltInFailures.RefPlaneFailures	Failures about RefPlane.
BuiltInFailures.RegenFailures	Failures about RegenFailures.
BuiltInFailures.RenderFailures	Failures related to rendering.
BuiltInFailures.RevisionCloudFailures	Failures about RevisionCloud.
BuiltInFailures.RevisionFailures	Failures about Revision Settings.
BuiltInFailures.RevolutionFailures	Failures about Revolution.
BuiltInFailures.RoofFailures	Failures about Roof.
BuiltInFailures.RoomFailures	Failures about Room.
BuiltInFailures.ScaleFailures	Failures about Scale.
BuiltInFailures.ScheduleViewFailures	Failures about Schedule.
BuiltInFailures.SculptingFailures	Failures about Sculpting.
BuiltInFailures.SectionViewFailures	Failures about Section.
BuiltInFailures.SelectionFailures	Failures about Selections.
BuiltInFailures.SharedCoordinatesFailures	Failures about shared coordinates.
BuiltInFailures.SheetCollectionFailures	Failures about SheetCollection.
BuiltInFailures.SheetFailures	Failures about Sheet.
BuiltInFailures.SiteFailures	Failures about Site.
BuiltInFailures.SiteImportFailures	Failures about SiteImport.
BuiltInFailures.SketchFailures	Failures about Sketch.
BuiltInFailures.SkylightFailures	Failures about Skylight.
BuiltInFailures.SlabFailures	Failures about Slab.
BuiltInFailures.SlabShapeFailures	Failures about SlabShape.
BuiltInFailures.SlantedColumnFailures	Failures about SlantedColumn.
BuiltInFailures.SpanDirectionSymbolFailures	Failures about SpanDirectionSymbol.
BuiltInFailures.SplineFailures	Failures about Spline.
BuiltInFailures.SplitSketchBasedElementFailures	Failures related to the split sketched based element.
BuiltInFailures.SplitToposolidFailures
BuiltInFailures.StairRampFailures	Failures about StairRamp.
BuiltInFailures.SteelElementFailures	Failures about steel elements
BuiltInFailures.SteelElementsFailures	Failures about SteelElement module
BuiltInFailures.StructuralAssetFailures	Failures related to structural materials.
BuiltInFailures.StructuralConnectionFailures	Failures about StructuralConnectionHandler.
BuiltInFailures.StructuralCustomConnectionFailures	Failures about StructuralConnectionHandler.
BuiltInFailures.StructuralLoadFailures	Failures about Load.
BuiltInFailures.SubRegionFailures
BuiltInFailures.SweepFailures	Failures about Sweep.
BuiltInFailures.SweptBlendFailures	Failures about SweptBlend.
BuiltInFailures.SystemNavigatorFailures	Failures related with the system browser.
BuiltInFailures.SystemsFailures	Failures about System.
BuiltInFailures.TagFailures	Failures about Tag.
BuiltInFailures.TextFailures	Failures about Text.
BuiltInFailures.TilePatternTileFailures	Failures related to tile pattern tile.
BuiltInFailures.ToggleViewFailures	Failures about ToggleView.
BuiltInFailures.TrussFailures	Failures about Truss.
BuiltInFailures.UniqueElementFailures
BuiltInFailures.ViewFailures	Failures about ViewFailures.
BuiltInFailures.ViewSheetFailures	Failures about placing viewports on sheets.
BuiltInFailures.WallFailures	Failures about Wall.
BuiltInFailures.WallJoinFailures	Failures about WallJoin.
BuiltInFailures.WallJoinRoofFailures	Failures about WallJoinRoof.
BuiltInFailures.WorksharingFailures	Failures about WorksharingFailures.
BuiltInFailures.ZoneFailures	Failures about Zone.
CADExportOptions	Generic CAD Export options.
CADLinkOperations	This class is used to extend the IExternalResourceServer interface with methods to support operations specifically related to DWG links.
CADLinkOptions	This class contains the options in use when or reloading a CAD link type (DWG, DXF, etc.)
CADLinkType	CADLinkType represents both CAD links and CAD imports. The function IsLink can be used to distinguish between the two. CAD imports are not ExternalFileReferences; they are brought completely into the document and maintain no connection to their original file.
CameraInfo	An object holding information about the projection mapping of a 3D view.
CancellationListener	Allows clients to poll the cancellation status of a background operation. Revit instantiates CancellationListener objects for internal background operation implementations only. As such, third-party developers are not expected to instantiate or handle CancellationListener objects.
Categories	The Categories object is a map that contains all the top-level Category objects within the Document.
Category	Represents the category or subcategory to which an element belongs.
CategoryNameMap	A map that contains a mapping of category name to its category object.
CategoryNameMapIterator	An iterator to a category name map.
CategorySet	A set that can contains Category objects.
CategorySetIterator	An iterator to a category set.
Ceiling	Represents a ceiling in Autodesk Revit.
CeilingAndFloor	A base class that provides support for all ceiling and floor objects.
CeilingType	Represents a ceiling type in Autodesk Revit.
ChangeType	A class representing a change that can be detected and tracked during Dynamic Update.
City	An object that contains geographical location information for a known city.
CitySet	An set that contains cities.
CitySetIterator	An iterator to a city set.
ClassificationEntries	A collection of ClassificationEntry objects that make up the classification table.
ClassificationEntry	Represents an entry in the classification table.
ClosestPointsPairBetweenTwoCurves	This class captures results of computation of closest points between two generic curves.
Color	Represents a color in Autodesk Revit.
ColorBackgroundSettings	Represents the rendering color background settings.
ColorFillLegend	Represents color fill legend.
ColorFillScheme	Represents a color scheme could be used to colorfy elements in floor plan views and section views.
ColorFillSchemeEntry	Represents an entry of a [!:Autodesk::Revit::DB::ColorFillScheme] .
ColorOptions	A class providing access to color settings which affect the colors applied to specific views.
ColorWithTransparency	Color with transparency
ColumnAttachment	An object representing the attachment of the top or bottom of a column to some target: a floor, roof, ceiling, beam, or brace.
CombinableElement	An element that can be added to a geometry combination.
CombinableElementArray	An array that contains CombinableElement objects.
CombinableElementArrayIterator	An iterator to an CombinableElement array.
ComponentRepeater	An element that contains and manages a set of repeated components.
ComponentRepeaterIterator	A slot iterator for ComponentRepeater.
ComponentRepeaterSlot	Represents a slot that holds one repeated component in a component repeater.
CompoundStructure	Describes the internal structure of a wall, floor, roof or ceiling.
CompoundStructureLayer	Describes a single layer in a CompoundStructure.
ConfigurationReloadInfo	This object contains information returned by a reload of the fabrication configuration.
ConicalFace	A conical face of a 3d solid or open shell.
ConicalSurface	A Conical Surface.
ConnectionValidationInfo	This object contains information about fabrication connection validations.
ConnectionValidationWarning	Contains information about a specific connection validation problem.
Connector	A connector in an Autodesk Revit MEP project document.
ConnectorElement	A base class that provides support for all connector elements occurring in families.
ConnectorManager	Provides access to the Connector Manager
ConnectorSet	A set that can contain any type of object.
ConnectorSetIterator	An iterator to a set.
Construction	Construction definition for Project Information.
ContentNode	This class represents a generic content node in a model-exporting process.
ContourSetting	Contour setting object that handles the contour information used to draw contours on elements.
ContourSettingItem	Contour setting item that stores the information of a single contour or a set of contours.
Control	A control in Autodesk Revit family document.
CopyPasteOptions	Settings to control the behavior of a copy-paste operation.
CurtainCell	Represents a CurtainCell within Autodesk Revit.
CurtainGrid	Represents a curtain grid element within Autodesk Revit.
CurtainGridLine	Represents a CurtainGridLine within Autodesk Revit.
CurtainGridSet	A set that can contain any type of object.
CurtainGridSetIterator	An iterator to a set.
CurtainSystem	Provides access to the CurtainSystem object in Autodesk Revit.
CurtainSystemBase	Provides access to the CurtainSystemBase object in Autodesk Revit.
CurtainSystemType	An object that represents CurtainSystem type.
Curve	A parametric curve.
CurveArrArray	An array that can contain any type of object.
CurveArrArrayIterator	An iterator to a array.
CurveArray	An array that can contain curves.
CurveArrayIterator	An iterator to a curve array.
CurveByPoints	A curve interpolating two or more points.
CurveByPointsArray	An array that can contain CurveByPoints elements.
CurveByPointsArrayIterator	An iterator to a CurveByPoints array.
CurveByPointsUtils	A static class that contains methods for processing curves driven by points.
CurveElement	Class representing curve elements.
CurveElementFilter	A filter used to pass curve elements which are of a specific type.
CurveExtents	Represents the start and end parameters for a curve segment.
CurveLoop	A class that represents a chain of curves.
CurveLoopIterator	An iterator to a curve loop.
CurveLoopsProfile	Represents a curve loop based profile for sweep or swept blend elements.
CurveNode	An output node that represents a model curve.
CurveUV	A class that encapsulates the notion of a curve in the 2D parameter space of a surface in 3D space.
CustomExporter	A class that allows exporting 3D or 2D views via an export context.
CustomFieldData	A class that offer access to the information about a custom field.
CylindricalFace	A cylindrical face of a 3d solid or open shell.
CylindricalHelix	A cylindrical helix.
CylindricalSurface	A cylindrical surface.
DataConversionMonitorScope	This class is used to regsiter an application-supplied object that implements IDataConversionMonitor. Creating the object registers an implementation of IDataConversionMonitor supplied as constructor argument. When the scope object is destroyed, that object is unregistered.
DatumPlane	A base class representing a datum surface (level, grid or reference plane) in Autodesk Revit.
DefaultDivideSettings	Provides access to project-wide divide settings.
DefaultOpenFromCloudCallback	A default callback that may be used to control Revit's behavior when opening a model.
Definition	The Definition object is a base object for all type of parameter definitions within the Autodesk Revit API.
DefinitionBindingMap	A map that contains mappings of parameter definitions to parameter bindings.
DefinitionBindingMapIterator	An iterator to a parameter definition to parameter bindings map.
DefinitionFile	The DefinitionFile object represents a shared parameters file on disk.
DefinitionGroup	The DefinitionGroup is a container that is used to hold shared parameter definitions on disk.
DefinitionGroups	A specialized set of definition groups that allows creation of new groups.
Definitions	A base class that supports the addition of new parameter definitions.
DeleteElements	Deletes element(s) related to the failure.
DeleteWorksetSettings	This class represents the settings used to delete a workset.
DesignOption	An element that represents a design alternative.
DetailArc	Represents a DetailArc within Autodesk Revit.
DetailCurve	A curve that is used to create a detail drawing. A detail curve is visible only in the view in which it is drawn.
DetailCurveArray	An array that can contain any type of object.
DetailCurveArrayIterator	An iterator to a array.
DetailElementOrderUtils	A utility class that arranges the draw order of the detail elements.
DetailEllipse	Represents a DetailEllipse within Autodesk Revit.
DetailLine	Represents a DetailLine within Autodesk Revit.
DetailNurbSpline	Represents a DetailNurbSpline within Autodesk Revit.
DGNExportOptions	The export options used by exporting DGN format file.
DGNImportOptions	The import options used to import DGN format files.
Dimension	An object that represents a dimension within the Revit project.
DimensionEqualityLabelFormatting	Instances of this class represent individual parameters used to make up a dimension equality formula for continuous linear or angular dimensions.
DimensionSegment	A segment of a dimension within the Autodesk Revit project.
DimensionSegmentArray	An array that can contain any number of DimensionSegment objects.
DimensionSegmentArrayIterator	An iterator to an array of DimensionSegment objects..
DimensionType	An object that represents a dimension style.
DirectShape	This class is used to store externally created geometric shapes. Primary intended use is for importing shapes from other data formats such as IFC or STEP. A DirectShape object may be assigned a category. That will affect how that object is displayed in Revit.
DirectShapeLibrary	DirectShapeLibrary is used to store pre-created geometry for further referencing via the definition/instance mechanism. It is not persistent: the scope of a library object is usually a single data creation session. DirectShape::createGeometryInstance and DirectShape::CreateElementInstance will use the current DirectShapeLibrary to look up the definitions. store a collection of GNodes as definition end class DirectShapeDefinition
DirectShapeOptions	This class is used to control behavior of a DirectShape object.
DirectShapeReferenceOptions	This class is used to control the behavior of DirectShape and DirectShapeType reference objects.
DirectShapeType	The type element associated with a DirectShape element. This element includes data reused by DirectShape elements of the same type.
DirectShapeTypeOptions	This class is used to control behavior of a DirectShapeType object.
DisableAnalyticalModelCB	Disable the analytical model for a structural wall.
DisciplineTypeId	This class contains constants identifying disciplines.
DisplacementElement	A view-specific element that causes other elements to appear to be displaced from their actual locations.
DisplacementPath	A view-specific annotation related to a DisplacementElement.
DividedPath	An element that consists of a set of points distributed along a path which consists of a connected set of curves and edges.
DividedSurface	An element that represents a mesh on the surface of another element, a family instance, an import instance or a geometry combination, and a tile pattern built on that mesh.
Document	An object that represents an open Autodesk Revit project.
DocumentDifference	DocumentDifference represents the difference (including added elements, modified elements and deleted elements) of a Revit model between different DocumentVersion of the model.
DocumentPreviewSettings	Contains the settings related to the saving of preview images for a given document.
DocumentSet	A set that can contain any documents.
DocumentSetIterator	An iterator to a set of documents.
DocumentValidation	Utility functions with document validation
DocumentVersion	This class uniquely identifies an edition of a given document.
DoubleArray	An array that contains doubles.
DoubleArrayIterator	An iterator to an array of doubles.
DoubleParameterValue	A class that holds a Double value of a parameter element.
DuplicateTypeNamesHandlerArgs	A structure that provides information about an attempt to copy types with names that already exist in the destination document.
DWFExportOptions	DWF Export options.
DWFImportOptions	The import options used by importing DWF or DWFx format file.
DWFXExportOptions	DWFX Export options.
DWGExportOptions	The export options used by exporting DWG format file.
DWGImportOptions	The import options used by importing DWG or DXF format file.
DXFExportOptions	The export options used by exporting DXF format file.
Edge	An edge of a 3d solid.
EdgeArray	An array that contains edges.
EdgeArrayArray	An array of edge arrays.
EdgeArrayArrayIterator	An iterator to an array or edge arrays.
EdgeArrayIterator	An iterator to an edge array.
EdgeEndPoint	Represents the start or the end point of an Edge.
EditScope	The base class for a scope object that provides special access and limitations related to editing certain elements.
Element	Base class for most persistent data within a Revit document.
ElementArray	An array that contains element objects.
ElementArrayIterator	An iterator to an element array.
ElementBinding	A base class for all types of binding that attach to an element.
ElementCategoryFilter	A filter used to match elements by their category.
ElementClassFilter	A filter used to match elements by their class.
ElementDesignOptionFilter	A filter used to find elements contained within a particular design option.
ElementFilter	A base class for a type of filter that accepts or rejects elements based upon criteria.
ElementId	The ElementId object is used as a unique identification for an element within a single project.
ElementIdParameterValue	A class that holds a ElementId value of a parameter element.
ElementIdSetFilter	A filter wrapping a set of elements.
ElementIntersectsElementFilter	A filter to find elements that intersect the solid geometry of a given element.
ElementIntersectsFilter	A base class for filters used to match elements which intersect with geometry.
ElementIntersectsSolidFilter	A filter to find elements that intersect the given solid geometry.
ElementIsCurveDrivenFilter	A filter used to match elements which are curve driven.
ElementIsElementTypeFilter	A filter used to match elements which are ElementTypes.
ElementLevelFilter	A filter used to match elements by their associated level.
ElementLogicalFilter	A filter used to logically combine two or more filters.
ElementMulticategoryFilter	A filter used to find elements whose category matches any of a given set of categories.
ElementMulticlassFilter	A filter used to match elements by their class, where more than one class of element may be passed.
ElementNode	A render node that represents an element, including the host document containing the element.
ElementOwnerViewFilter	A filter used to match elements which are owned by a particular view.
ElementParameterFilter	A filter used to match elements by one or more parameter filter rules.
ElementPhaseStatusFilter	A filter used to match elements that have a given phase status on a given phase.
ElementQuickFilter	A base class for a type of filter that operates on element records.
ElementRecord	A record in the Revit database representing an element.
ElementSet	A set that contains element objects.
ElementSetIterator	An iterator to an element set.
ElementSlowFilter	A base class for a type of filter that operates on expanded elements.
ElementStructuralTypeFilter	A filter used to find elements matching a structural type.
ElementTransformUtils	A collection of utilities allowing transformation of elements (e.g. move, rotate, mirror and copy).
ElementType	Base class for all Types within Autodesk Revit.
ElementWorksetFilter	A filter used to match elements which reside in a given workset.
ElevationMarker	ElevationMarkers either host elevation ViewSection views or view references.
Ellipse	A whole or partial ellipse.
EvaluatedParameter	Hold the evaluated ParameterValue and Definition of a parameter.
ExclusionFilter	A filter used to exclude a set of elements automatically.
ExportDGNSettings	This element contains DGN export settings which are saved in a Revit document.
ExportDWGSettings	This element contains DWG/DXF export settings which are saved in a Revit document.
ExportFontInfo	A value used to represent the info stored in an ExportFontTable .
ExportFontKey	A key used to represent an item stored in an ExportFontTable .
ExportFontTable	A table supporting a mapping of Revit font names to font names that will be set in the target export format.
ExportFontTableIterator	An iterator to a set of font table.
ExportIFCCategoryInfo	Represents the mapped IFC information stored in the template.
ExportIFCCategoryKey	Represents a Revit category item stored in a template.
ExportLayerInfo	A value used to represent the info stored in the ExportLayerTable .
ExportLayerKey	A key used to represent an item stored in an ExportLayerTable .
ExportLayerTable	A table supporting a mapping of category and subcategory to layer name and other layer properties that will be set in the target export format.
ExportLayerTableIterator	An iterator to a set of Layer table.
ExportLinetypeInfo	A value used to represent the info stored in the ExportLinetypeTable .
ExportLinetypeKey	A key used to represent an item stored in an ExportLinetypeTable .
ExportLinetypeTable	A table supporting a mapping of linetypes in Revit to linetype names that will be set in the target export format.
ExportLinetypeTableIterator	An iterator to a set of line type table.
ExportLineweightInfo	A value used to represent the info stored in the ExportLineweightTable .
ExportLineweightKey	A key used to represent an item stored in an ExportLineweightTable .
ExportLineweightTable	A table supporting a mapping of line weights in Revit to line weight names that will be set in the target export format.
ExportLineweightTableIterator	An iterator to a set of line weight table.
ExportPatternInfo	A value used to represent the info stored in the ExportPatternTable .
ExportPatternKey	A key used to represent an item stored in an ExportPatternTable .
ExportPatternTable	A table supporting a mapping of FillPatterns in Revit to pattern names that will be set in the target export format.
ExportPatternTableIterator	An iterator to a set of Pattern table.
ExportPDFSettings	Settings for PDF export
ExportUtils	This class provides utilities related to document export.
ExternalDefinition	The ExternalDefinition object adds properties specific to Autodesk Revit shared parameter definitions.
ExternalDefinitionCreationOptions	An option class used for creating a new shared parameter definition, including options such as name, type, visibility, Guid description and modifiable flag.
ExternalDefinitions	Supports the creation of new shared parameters definitions.
ExternalFileReference	A class that contains the details of a reference to a file outside of a given document.
ExternalFileUtils	A utility class containing functions related to external file references.
ExternalGeometryId	This class represents an identifier for geometry from external sources.
ExternallyTaggedBRep	An ExternallyTaggedSolid can hold any shape created by BRepBuilder.
ExternallyTaggedGeometryObject	Base class for ExternallyTaggedGeometryObject and ExternallyTaggedSolid.
ExternallyTaggedGeometryValidation	Provides validation for geometry to be stored in an ExternallyTaggedGeometry.
ExternallyTaggedNonBRep	This class is used to create an externally tagged geometry object.
ExternallyTaggedNonBReps	Holds a collection of ExternallyTaggedNonBRep instances.
ExternalResourceBrowserData	Represents a collection of external resources and external resource folders to be presented as the content of a folder in the file browser in Revit.
ExternalResourceLoadContent	This class contains the actual content data and other results of an external resource load operation that are returned by an IExternalResourceServer to Revit.
ExternalResourceLoadContext	This class contains data describing the context related to an external resource load operation.
ExternalResourceLoadData	This class contains the input and output data resulting from invoking an IExternalResourceServer's LoadResource method. After the call to LoadResource, the resulting ExternalResourceLoadData will be passed into IExternalResourceServer.HandleLoadResourceResults() so that appropriate UI can be displayed. Server providers can inspect the ExternalResourceLoadData to get an ExternalResourceLoadContent object of the subclass appropriate to the external resource. The class also contains a copy of the ExternalResourceReference, and information about the context of the load operation.
ExternalResourceMatchOptions	Represents match options used to filter external resources when listing them from external resource server.
ExternalResourceReference	This class identifies an external resource provided by an IExternalResourceServer.
ExternalResourceServerExtensions	An object that contains overrides for external resource-specific methods.
ExternalResourceServerUtils	Contains utilities related to external resource server.
ExternalResourceServiceUtils	Contains utilities related to external resource service.
ExternalResourceSubFolder	Data that describes a remote folder to be shown in the file browser dialog
ExternalResourceType	A type class used to distinguish between different kinds of external resource.
ExternalResourceTypes	Provides a container of all Revit built-in ExternalResourceType instances.
ExternalResourceTypes.BuiltInExternalResourceTypes	A collection of ids of the ExternalResourceTypes provided by Revit.
ExternalResourceUtils	A utility class containing functions related to external resource references.
Extrusion	A extrusion solid or void form.
ExtrusionAnalyzer	This geometry utility allows you to attempt to "fit" a given piece of geometry into the shape of an extrusion.
ExtrusionRoof	Represents some kinds of Extrusion Roofs.
FabricationAncillaryUsage	Structure that holds information about the usage of a fabrication ancillary
FabricationConfiguration	This element contains the information about the fabrication configuration settings used by the project.
FabricationConfigurationInfo	Represents an MEP object that holds the properties of an MEP fabrication configuration.
FabricationConnectorInfo	Fabrication connector information.
FabricationDimensionDefinition	Represents the definition of a single fabrication pattern dimension. Together all dimensions represent the parametric definition of the fabrication part.
FabricationHostedInfo	The fabrication hosted element information.
FabricationItemFile	This class holds information about the item file, including whether it is already loaded from disk into Revit.
FabricationItemFolder	A fabrication item folder that can contain sub folders and access to the FabricationItemFile s contained within.
FabricationPart	Represents a fabrication component in the Autodesk Revit MEP product.
FabricationPartType	Represents a fabrication component type in the Autodesk Revit MEP product.
FabricationRodInfo	The rod information of the fabrication part.
FabricationService	This object contains information about a fabrication service.
FabricationServiceButton	The object contains information about a fabricaton button.
FabricationServiceSettings	Represents the settings related to the fabrication services.
FabricationVersionInfo	The object contains versioning information about fabrication data.
Face	A bounded face of a 3d solid or open shell.
FaceArray	An array that contains faces.
FaceArrayIterator	An iterator to a face array.
FaceDetailNode	A base class of output nodes that represent face edges and face silhouettes.
FaceEdgeNode	An output node that represents a Face edge.
FaceNode	An output node that represents a Face.
FaceSecondDerivatives	Contains second partial derivatives of a face at a specified point.
FaceSilhouetteNode	An output node that represents a Face edge.
FaceSplitter	Represents an element that splits a face.
FacetingUtils	This class is used to convertTrianglesToQuads a triangulated structure into a structure in which some of the triangles have been consolidated into quadrilaterals.
FaceToposolid	An object that represents a face-based Toposolid within the Autodesk Revit project.
FaceWall	A wall attached to a non-vertical massing face.
FailureDefinition	Defines persistent information about a failure.
FailureDefinitionAccessor	A class that provides access to the details of a FailureDefinition after the definition has been defined.
FailureDefinitionId	The unique identifier of a FailureDefinition.
FailureDefinitionRegistry	The global registry for all FailureDefinitions in the Revit session.
FailureHandlingOptions	Options to control how failures (if any occurred during the transaction) should be handled at the time the transaction is being ended.
FailureMessage	Represents a message describing a failure of an operation in Revit.
FailureMessageAccessor	Restricted accessor for FailureMessage.
FailureMessageKey	A unique key assigned to each posted failure message
FailureResolution	Defines a resolution for a failure.
FailuresAccessor	An interface class that provides access to failure information posted in a document and methods to resolve these failures.
Family	An element that represents a custom family (not a system family) in Autodesk Revit.
FamilyElementVisibility	Provides access to the visibility parameters of family elements in family document.
FamilyInstance	This object represents a single instance of a family type, such as a single I beam.
FamilyInstanceFilter	A filter used to find elements that are family instances of the given family symbol.
FamilyManager	The family manager object to manage the family types and parameters in family document.
FamilyParameter	The family parameter object.
FamilyParameterSet	A set that contains FamilyParameter objects.
FamilyParameterSetIterator	An iterator to a FamilyParameter set.
FamilyPointLocation	Data corresponding to the point locations in certain types of Family Symbols.
FamilyPointPlacementReference	This object represents data corresponding to the placement references in a certain types of Family Instances (see examples listed below).
FamilySizeTable	Contains size information for a family.
FamilySizeTableColumn	Contains column information for a FamilySizeTable.
FamilySizeTableErrorInfo	Error information generated from the CSV file import of a FamilySizeTable.
FamilySizeTableManager	Manages importing, exporting, and querying size data through the FamilySizeTable class.
FamilySymbol	An element that represents a single type with a Family.
FamilySymbolFilter	A filter used to find all family symbols of the given family.
FamilySymbolProfile	Represents a family symbol based profile for sweep or swept blend elements.
FamilyThermalProperties	A class that contains thermal properties for specific types of families (doors, windows, and curtain wall panels).
FamilyType	The family type object provides read access to the values of family parameters for this type.
FamilyTypeSet	A set that contains FamilyType objects.
FamilyTypeSetIterator	An iterator to a FamilyType set.
FamilyUtils	Contains utilities related to family operations.
FBXExportOptions	3D-Studio Max (FBX) Export options.
FilePath	This class represents a path on a disk or network location, but not a path to a Revit server location.
FilledRegion	A filled region element.
FilledRegionType	A filled region attributes element. Note, the forground pattern color is stored in the parent class
FillGrid	Represents a grid line in a fill pattern.
FillPattern	Represents a fill pattern object.
FillPatternElement	An element that represents a fill pattern.
FilterableValueProvider	Defines the interface for classes that extract values from elements in a Revit project for testing against filter rules.
FilterCategoryRule	A filter rule that matches elements of a set of categories.
FilterDoubleRule	A filter rule that operates on double-precision numeric values in a Revit project.
FilteredElementCollector	This class is used to search, filter and iterate through a set of elements.
FilteredElementIdIterator	An iterator to a set of element ids filtered by the settings of a FilteredElementCollector.
FilteredElementIterator	An iterator to a set of elements filtered by the settings of a FilteredElementCollector.
FilteredWorksetCollector	This class is used to search, filter and iterate through a set of worksets.
FilteredWorksetIdIterator	An iterator to a set of workset ids filtered by the settings of a FilteredWorksetCollector.
FilteredWorksetIterator	An iterator to a set of worksets filtered by the settings of a FilteredWorksetCollector.
FilterElement	The base class for filter elements in the document.
FilterElementIdRule	A filter rule that operates on ElementId values in a Revit project.
FilterGlobalParameterAssociationRule	A filter rule that operates on global parameters ElementId values in a Revit project.
FilterIntegerRule	A filter rule that operates on integer values in a Revit project.
FilterInverseRule	A filter rule that inverts the boolean values returned by the rule it contains.
FilterNumericEquals	Tests whether numeric values from the document are equal to a certain value
FilterNumericGreater	Tests whether numeric values from the document are greater than a certain value
FilterNumericGreaterOrEqual	Tests whether numeric values from the document are greater than or equal to a certain value
FilterNumericLess	Tests whether numeric values from the document are less than a certain value
FilterNumericLessOrEqual	Tests whether numeric values from the document are less than or equal to a certain value
FilterNumericRuleEvaluator	Base for all classes that compare numeric values from Revit to a user-supplied filter value.
FilterNumericValueRule	Base for all classes that use a FilterNumericRuleEvaluator to perform their comparisons
FilterOperatorAndTextString	An instance of this class holds a filter operator and a text string that denotes the operator in a particular context. For example, the text string for ScheduleFilterType::LessThan may be "is less than" for a filter rule based on a parameter with numerical values or "is below" for a filter rule based on a parameter representing a Level.
FilterRule	Defines a boolean operation that can be used to cull elements from a document.
FilterStringBeginsWith	Tests whether string values from the document begin with a certain string.
FilterStringContains	Tests whether string values from the document contain a certain string.
FilterStringEndsWith	Tests whether string values from the document end with a certain string.
FilterStringEquals	Tests whether string values from the document match a certain string.
FilterStringGreater	Tests whether string values from the document would sort after a certain string.
FilterStringGreaterOrEqual	Tests whether string values from the document would sort after or match a certain string.
FilterStringLess	Tests whether string values from the document would sort before a certain string.
FilterStringLessOrEqual	Tests whether string values from the document would sort before or match a certain string.
FilterStringRule	A filter rule that operates on string values in a Revit project.
FilterStringRuleEvaluator	Base for all classes that compare string values from Revit to a user-supplied filter value
FilterValueRule	A rule that filters on a particular value of an element.
Floor	An object that represents a Floor within the Autodesk Revit project.
FloorType	An object that specifies the type of a floor in Autodesk Revit.
FolderItemInfo	Contains data for each folder item in the organization settings of the project browser including folder parameter Id and folder name.
FootPrintRoof	Represents kinds of FootPrintRoofs.
ForgeTypeId	This class holds a string that uniquely identifies a Forge schema.
Form	An object that represents a Form within the Autodesk Revit Massing Family.
FormArray	An array that contains form objects.
FormArrayIterator	An iterator to a form array.
FormatOptions	Options for formatting numbers with units.
FormattedText	FormattedText is used to create, edit and format text in a TextNote or to query the text and format properties of a TextNode
FormatValueOptions	Options for formatting numbers with units into strings.
FormulaManager	A class to access and query information about formula engine in Revit models.
FormUtils	Define Form utility functions
Frame	A Frame comprises three vectors at a base point in 3D space.
FreeFormElement	A Free Form Element that contains non-parametric geometry created from an input solid outline.
GBXMLExportOptions	Green-Building XML Export options.
GBXMLImportOptions	Import options for Green-Building XML format.
GenericForm	Provides access to the Generic Form model in Autodesk Revit.
GenericImportOptions	Generic Import options.
GeomCombination	An element created by Join and Cut operations applied to combinable elements in an Autodesk Revit family document.
GeomCombinationSet	A set that contains GeomCombination objects.
GeomCombinationSetIterator	An iterator to a GeomCombination set.
GeometryCreationUtilities	A utility that allows construction of basic solid shapes.
GeometryElement	Geometric representation of an element.
GeometryInstance	An instance of another element (symbol), specially positioned by this element.
GeometryObject	The common base class for all geometric primitives.
GlobalParameter	This class represents a GlobalParameter element in Revit.
GlobalParametersManager	A class to access and query information about global parameters in Revit models.
GradientBackgroundSettings	Represents the view gradient background settings.
GraphicsStyle	The graphics style instance in Autodesk Revit document.
Grid	Represents a single grid line within Autodesk Revit.
GridType	An object that represents a grid type.
Group	An element representing a single instance of a group of elements that may be placed many times in a project or family.
GroupLoadOptions	A class containing options for loading a group from a file.
GroupNode	A node that represents set of individual elements grouped together in some form, such as an instance of a family or linked Revit file, or an instance of a part of symbol's geometry.
GroupSet	An set that contains groups.
GroupSetIterator	An iterator to a group set.
GroupType	An element representing a group of elements that may be placed many times in a project or family.
GroupTypeId	This class contains constants identifying parameter groups.
GuidEnum	Base class of all GUID-based enum classes.
HasNoValueFilterRule	Tests whether an element's parameter doesn't have a value.
HasValueFilterRule	Tests whether an element's parameter has a value.
HermiteFace	A cubic hermite spline face of a 3d solid or open shell.
HermiteSpline	A Hermite spline.
HermiteSplineTangents	This class indicates tangency at the start, the end, or both ends of the curve.
HermiteSurface	A Hermite Surface.
HomeCamera	A structure that contains information about the camera and view for the Home view orientation stored in the model.
HostedSweep	An object that represents an object hosted by an edge of a roof or floor within the Autodesk Revit project.
HostedSweepType	An object that represents the attributes for sweep host objects in Autodesk Revit.
HostObjAttributes	An object that represents characteristics of several kinds of type.
HostObject	A base class that provides support for all objects that can host other objects, such as walls roofs, and floors.
HostObjectUtils	These are generic host object utilities.
IFCBuiltInCategoryKey	A key used to represent an item stored in a template.
IFCCategoryTemplate	Represents an element that contains an IFC category mapping template stored in a Revit document.
IFCExportOptions	IFC Export options.
ImageBackgroundSettings	Represents the rendering image background settings.
ImageExportOptions	This class defines options for exporting views and sheets as an image.
ImageInstance	An element that represents an instance of an image placed in a view
ImagePlacementOptions	ImagePlacementOptions are used to describe where an ImageInstance should be placed in a view
ImageType	Represents a type containing a raster based image. ImageInstances of this type can be placed in 2D views, sheets, and schedules.
ImageTypeOptions	Represents the options used in ImageType::Create(Document, ImageTypeOptions) and ImageType.ReloadFrom(ImageTypeOptions) methods.
ImageView	Class for ImageView views
ImportIFCOptions	Provides access to settings that control linking and opening IFC files.
ImportInstance	An element created during either import or link operation. It is an instance of CADLinkType.
ImportOptions3DM	The import options used to import 3DM format files.
InCanvasControlData	Represents a collection of data which is used by [!:Autodesk::Revit::DB::TemporaryGraphicsManager] to create and update an in-canvas control.
IndependentTag	Represents tag annotations in Revit. getBBoxCorers in MultipleAlignmentHelper needs access to some protected members.
InsertableObject	A base class you all types that are insertable.
InSessionPrintSetting	Represents the in-session Print Setup (Application Menu->Print->Print Setup) within Autodesk Revit.
InSessionViewSheetSet	Represents the in-session ViewSheetSet.
Instance	The base class for all instance objects.
InstanceBinding	The InstanceBinding object is used to signify a binding between a parameter definition and a parameter on each instance of an element, such as a wall.
InstanceNode	An output node that represents an instance of a geometry. It can be an instance of FamilyInstance, or it can be and instance of a part of symbol's geometry.
InstanceVoidCutUtils	Utilities for cutting elements by unattached voids in family instances.
InsulationLiningBase	Acts as the base class for duct insulation, pipe insulation and duct lining elements.
IntegerParameterValue	A class that holds an Integer value of a parameter element.
IntegerRange	A class to define a range of a sequence of consecutive integer numbers
InternalDefinition	This object represents a parameter definition in an Autodesk Revit model.
InternalDefinitions	This object blocks attempts to create new internal definitions as they are not permitted.
InternalOrigin	A class representing the origin of internal coordinate system. Each Revit project contains one InternalOrigin.
IntersectingElementData	Stores information of an element that intersects with another element
IntersectionResult	This class captures results of intersecting geometric entities. "Intersecting" is meant in generalized sense, so the same class will be used for projection, containment, etc. Refer to the documentation of the method providing the result for the precise meaning of properties.
IntersectionResultArray	An array that can contain any type of object.
IntersectionResultArrayIterator	An iterator to a array.
JoinGeometryUtils	Utilities for joining and unjoining elements, and for managing the order in which elements are joined.
KeyBasedTreeEntries	A collection of KeyBasedTreeEntry objects that make up the key-based tree.
KeyBasedTreeEntriesIterator	An iterator to a set of KeyBasedTreeEntry objects.
KeyBasedTreeEntriesLoadContent	This class is used by IExternalResourceServers to return KeyBasedTreeEntries data to Revit when their LoadResource method is invoked.
KeyBasedTreeEntriesLoadResults	This class contains the results and status information regarding an attempt to load the KeyBasedTreeEntries from an External Resource.
KeyBasedTreeEntry	A key-based tree entry, containing the key, parent key, and children keys (if applicable).
KeyBasedTreeEntryError	This class contains information about a problem encountered while creating a KeyBasedTreeEntries object.
KeyBasedTreeEntryTable	KeyBasedTreeEntryTable represents the collection of key-based tree entries for a document.
KeynoteEntries	A collection of KeynoteEntry objects that make up the keynote table.
KeynoteEntry	Represents an entry in the keynote table, containing the key value, keynote text, and parent key (if applicable).
KeynoteTable	KeynoteTable represents the collection of keynotes (KeynoteEntries) for a document.
LabelUtils	Used to obtain user-visible names for enums.
LayerModifier	A modifier used to designate extra strings to appear in the exported layer name.
LayoutRule	The LayoutRule object is a base object for all type of layout rules for Beam System within the Autodesk Revit API.
LayoutRuleClearSpacing	This class indicate the layout rule of a Beam System is Clear-Spacing.
LayoutRuleFixedDistance	This class indicate the layout rule of a Beam System is Fixed-Distance.
LayoutRuleFixedNumber	This class indicate the layout rule of a Beam System is Fixed-Number.
LayoutRuleMaximumSpacing	This class indicate the layout rule of a Beam System is Max-Spacing.
Leader	A leader object that can be attached to annotation elements such as text notes.
LeaderArray	An array that can contain any number of leaders.
LeaderArrayIterator	An iterator to an array of leaders.
Level	Represents a Level within Autodesk Revit.
LevelAssociationData	This class holds information related to Level.
LevelType	An object that represents a Level type.
LightNode	This class represents a Light element in a model-exporting process.
Line	A line in space.
LineAndTextAttrSymbol	An object that represents a dimension style.
LinearArray	An object that represents an Array created linearly within the Revit project.
LinearDimension	LinearDimString
LinePattern	Represents a line pattern definition.
LinePatternElement	An element that represents a line pattern.
LinePatternSegment	Represents a segment in a line pattern.
LineProperties	A structure that has access to the pen properties of lines/curves that are currently being drawn/exported via an export context during a custom export process.
LineSegment	An output node that represents a tessellated line segment.
LinkConversionData	This class contains the information necessary to re-create a Revit document from an external source.
LinkElementId	LinkElementId represents an element in a linked document.
LinkLoadContent	This class is used by IExternalResourceServers to return Link data to Revit when their LoadResource method is invoked. It also contains additional information used by IExternalResourceUIServers to display link load status results to the user.
LinkLoadResult	This class stores the results of trying to load a single linked model.
LinkNode	An output node that represents a linked Revit document.
LinkOperations	This class is used to extend the IExternalResourceServer interface with methods to support operations for elements that are LinkTypes.
LoadedFamilyIntegrityCheck	Functions for checking the integrity of loaded families.
Location	Provides location functionality for all elements.
LocationCurve	Provides location functionality for all elements that are based upon a curve.
LocationPoint	Provides location functionality for all elements that have a single insertion point.
LogicalAndFilter	A filter that contains a set of filters. The filter passes when all filters in the set pass.
LogicalOrFilter	A filter that contains a set of filters. The filter passes when any filter in the set passes.
MassInstanceUtils	A static class that contains methods for processing curves driven by points.
Material	Represents a material element within an Autodesk Revit project.
MaterialNode	This class represents a change of material during a model-exporting process.
MathComparisonUtils	This class contains a set of mathematical utilities to compare doubles, using the internal tolerance.
MEPAnalyticalConnection	Represents an analytical element that connects mechanical equipment to piping network.
MEPAnalyticalConnectionType	Represents an analytical connection type between mechanical equipment and piping network.
MEPCalculationServerInfo	a struct to hold the information about a MEP calucation servers
MEPConnectorInfo	MEP connector information.
MEPCurve	A curve object for duct or pipe blend elements.
MEPCurveType	The base type class for MEP curves, such as ducts, pipes, cable trays and conduits.
MEPFamilyConnectorInfo	MEP family connector information.
MEPModel	Supports all MEP models that are persistent within the Autodesk Revit project.
MEPSize	Stores the basic size information for an MEP duct, pipe, cable tray, or conduit.
MEPSupportUtils	General utility methods for the Autodesk Revit MEP Supporting components.
MEPSystem	A system in the Autodesk Revit MEP product.
MEPSystemType	A system type in the Autodesk Revit MEP product.
Mesh	A triangular mesh.
MeshFromGeometryOperationResult	Describes what TessellatedShapeBuilder has built.
MeshTriangle	One triangle of a mesh.
ModelArc	Represents a ModelArc within Autodesk Revit.
ModelCurve	A model element that exists in 3D space and is visible in all views of a Revit project.
ModelCurveArrArray	An array that can contain any type of object.
ModelCurveArrArrayIterator	An iterator to a array.
ModelCurveArray	An array that contains model curves.
ModelCurveArrayIterator	An iterator to a model curve array.
ModelCurveNode	A base class of output nodes that represent various model curves.
ModelEllipse	Represents a ModelEllipse within Autodesk Revit.
ModelHermiteSpline	Represents a ModelHermiteSpline within Autodesk Revit.
ModelLine	Represents a ModelLine within Autodesk Revit.
ModelNurbSpline	Represents a ModelNurbSpline within Autodesk Revit.
ModelPath	A path to a file stored on a disk or on a server.
ModelPathUtils	Utility functions using ModelPaths
ModelText	A model text element in an Autodesk Revit family document.
ModelTextType	A model text type symbol in the Autodesk Revit Family document.
Mullion	Represents a CurtainGrid within Autodesk Revit.
MullionType	An object that represents a mullion type.
MullionTypeSet	A set that contains mullion types.
MullionTypeSetIterator	An iterator to a mullion type set.
MultipleValuesIndicationSettings	MultipleValuesIndicationSettings is an element which contains project-wide settings for multiple values indication in Properties Palette and schedules.
MultiReferenceAnnotation	Multi-reference annotations are annotations pointing to more than one reference, consisting of a dimension and associated tag.
MultiReferenceAnnotationOptions	Options which control the creation of MultiReferenceAnnotations.
MultiReferenceAnnotationType	The type for MultiReferenceAnnotation.
MultiSegmentGrid	This element acts as a multi-segmented Grid. The individual grids associated to the MultiSegmentGrid behave as a single unit and all share the same text. They inherit their type (GridType) from the MultiSegmentGrid.
NamingUtils	A collection of utilities related to element naming.
NavisworksExportOptions	Options which controls the Navisworks export.
NestedFamilyTypeReference	A proxy element representing a nested family type.
NullParameterValue	A class that represent an empty (null) value of a parameter element.
NumberingSchema	A class to support assigning numbers to elements of a particular kind for the purpose of tagging and scheduling them.
NumberingSchemaType	A type for identifying a NumberingSchema of a particular kind.
NumberingSchemaTypes	Provides a container of all Revit built-in NumberingSchemaType instances.
NumberingSchemaTypes.StructuralNumberingSchemas	A collection of types of built-in Numbering Schemas that are used for numbering structure elements.
NumberSystem	An annotation that consists of a series of numeric tags attached to and describing a host element.
NumericRevisionSettings	Contains settings that apply to Revisions with the Numeric RevisionNumberType.
NurbSpline	A nurb spline.
NurbsSurfaceData	A class used to represent the definition of a NURBS surface.
OBJExportOptions	The export options used by exporting to OBJ file format.
OBJImportOptions	The import options used to import OBJ format files.
OffsetSurface	A mathematical representation of an offset surface. Definition of offset surface, quoted from the STEP manual ISO 10303-42:2000(E): This is a procedural definition of a simple offset surface at a normal distance from the originating surface. Distance may be positive, negative, or zero to indicate the preferred side of the surface. The offset surface takes its parametrization directly from that of its basis surface, corresponding points having identical parameter values. The offset surface is parametrized as O(u, v) = S(u, v) + d*N(u, v), where N(u, v) is the oriented unit normal vector of the basis surface S at parameter value (u, v), and d is the signed offset distance. In Revit, we restrict the types of basis surfaces for which an OffsetSurf can be created for the following reasons: The offsets of Plane, CylindricalSurface, ConicalSurface and RevolvedSurface are of the same type as the original surface and they have closed form solutions. So those surfaces are not taken as basis surfaces of the OffsetSurface class. That leaves HermiteSurface and RuledSurface. As a Revit surface, we require the OffsetSurface to be C2 continuous. That implies that the basis surface should be C3 continuous. That is because the OffsetSurface evaluation involves the normal of the basis surface and the order of continuity of the normal is one less than that of the surface. HermiteSurfaces in general are not C3 continuous, even though some of them can be. A RuledSurface will be C3 continuous if its parametric curves are C3 continuous. So we don't allow a HermiteSurface to be a basis surface and allow only RuledSurfaces whose parametric curves are C3 continuous as basis surfaces of the OffsetSurface class. The OffsetSurface class will own a copy of the basis surface and use it for many of its methods, which may implicitly assume that the OffsetSurface and the basis surface have the same envelope. So we keep the envelopes of the OffsetSurf and its basis surface in sync.
Opening	An opening in an Autodesk Revit project or family document.
OpenOptions	This class contains options available for opening a document from disk.
OptionalFunctionalityUtils	A collection of utilities that can be used to determine if a particular set of functionality is installed and available.
Options	User preferences for parsing of geometry.
OrdinateDimensionSetting	Represents a collection of Ordinate Dimension settings that can be associated to an ordinate DimensionType.
Outline	Outline is a generic object that provides a bounding box/bounding outline. It supports operations to scale and transform. It also supports intersections and contains operations.
OverrideGraphicSettings	Settings to override display of elements in a view.
Panel	This object represents a curtain panel.
PanelType	An object that represents a curtain panel type.
PanelTypeSet	A set that contains panel types.
PanelTypeSetIterator	An iterator to a panel type set.
PaperSize	An object that represents a Paper Size of Print Setup within the Autodesk Revit project.
PaperSizeSet	A set that can contain any number of paper size objects.
PaperSizeSetIterator	An iterator to a set of paper size objects.
PaperSource	An object that represents a Paper Source of Print Setup within the Autodesk Revit project.
PaperSourceSet	A set that can contain any number of paper source objects.
PaperSourceSetIterator	An iterator to a set of paper source objects.
Parameter	The parameter object contains the value data assigned to that parameter.
ParameterDownloadOptions	An option class used for downloading parameters from the Parameters Service.
ParameterElement	An Element that stores a user-defined parameter.
ParameterFilterElement	Admits elements that satisfy two conditions: The element's category must be one of a certain set of allowed categories. The element must pass a series of filter rules.
ParameterFilterRuleFactory	Contains functions that create appropriate FilterRule objects based on the parameters given.
ParameterFilterUtilities	Contains static utility functions for enumerating the categories and parameters that are available for use by ParameterFilterElement objects.
ParameterMap	A map that can contain a mapping of a parameter name (a String) to a parameter.
ParameterMapIterator	An iterator to a map relating a parameter name (the key, a String) to a parameter.
ParameterSet	A set that contains parameters.
ParameterSetIterator	An iterator to a parameter set.
ParameterTypeId
ParameterUtils	A utility class of functions related to parameters.
ParameterValue	A class that holds a value of a parameter element.
ParameterValuePresenceRule	Tests whether an element's parameter has a value or not.
ParameterValueProvider	Gets the value of a parameter from any element passed to GetStringValue, GetDoubleValue, GetIntegerValue, or GetElementIdValue.
Part	This element represents a part of another element.
PartMaker	PartMaker is an element which takes some source elements (e.g., a wall with all its layers) and creates one or more Parts out of it. The logic according to which these Parts are created is non-trivial and PartMaker uses various PartMakerMethods which represents these logics. This element manages the strategy to make Part elements for one or more original elements.
PartMakerMethodToDivideVolumes	By-References dividing strategy used by PartMaker element. TODO_REFACTOR("LegacyMechanismOfMovingElements") returns true if - the Host Elements are not floors or walls - OR - the Host Elements that are referenced by this PartMaker are floors or walls - transformation has already been applied on those Host Elements
PartUtils	General Part utility methods
Path3d	Provides access to the Generic 3D path object in Autodesk Revit.
PDFExportOptions	Options for PDF export
PerformanceAdviser	The tool to report performance problems in a given document.
PerformanceAdviserRuleId	The unique identifier of a PerformanceAdviserRule
PerformanceAdviserRules	Provides a container of all Revit built-in PerformanceAdviserRuleId instances.
Phase	Represents a phase in the life of a building.
PhaseArray	An array that contains phase objects.
PhaseArrayIterator	An iterator to a phase array.
PhaseFilter	Represents an phase filter within Autodesk Revit.
PlanarFace	A bounded face of a 3d solid or open shell.
PlanCircuit	An object that represents an enclosed area in a plan view within the Autodesk Revit project.
PlanCircuitSet	A set that can contain any number of plan circuit objects.
PlanCircuitSetIterator	An iterator to a set of plan circuit objects.
Plane	A Planar surface.
PlanTopology	An object that represents a Plan Topology within the Autodesk Revit project.
PlanTopologySet	A set that can contain any number of plan topology objects.
PlanTopologySetIterator	An iterator to a set of plan topology objects.
PlanViewRange	This class represents the view range of a plan view or a plan region. It records the element ids of the levels which a plane is relative to and the offset of each plane from that level.
Point	A 3D point.
PointCloudInstance	Represents a single instance of a point cloud in the Revit document.
PointCloudType	Represents a type of point cloud loaded into a Revit document. Each PointCloudType maps to a single file or identifier (depending upon the type of Point Cloud Engine which governs it).
PointElementReference	Base class for objects defining a way to constrain a ReferencePoint to one or more other objects in a document.
PointLocationOnCurve	Defines the measurement parameters necessary to create a point at a specific location on a curve.
PointNode	An output node that represents a 3D point.
PointOnEdge	Define a ReferencePoint relative to a referenceable edge or curve on another element.
PointOnEdgeEdgeIntersection	Define a ReferencePoint at the intersection of two referenceable lines.
PointOnEdgeFaceIntersection	Define a ReferencePoint at the intersection of a referenceable edge or curve and a referenceable face.
PointOnFace	Define a ReferencePoint relative to a Face.
PointOnPlane	Define a ReferencePoint relative to a planar reference.
PointRelativeToPoint	Represents a point placed relative to another point.
PolyLine	A polyline.
PolylineNode	An output node that represents a 3D polyline.
PolylineSegments	An output node that represents a tessellated polyline segments.
PolymeshFacet	A class representing one triangular piece - a facet - in a polymesh topology.
PolymeshTopology	A class representing topology of a polymesh.
PrimaryDesignOptionMemberFilter	A filter used to find elements contained in any primary design option of any design option set.
PrimarySizeCriterion	This class contains a size criterion for a RoutingPreferenceRule.
PrintManager	The PrintManager object is used to configure the global print settings.
PrintParameters	An object that contains settings used for printing the document.
PrintSetting	Represents the Print Setup (Application Menu->Print->Print Setup) within Autodesk Revit.
PrintSetup	Represents the Print Setup (Application Menu->Print->Print Setup) within Autodesk Revit.
Profile	A geometric profile consisting of a loop of curves.
ProjectInfo	An object that represents a Project Information within the Autodesk Revit project.
ProjectLocation	A representation of a specific instance and location of the current project.
ProjectLocationSet	An set that contains project locations.
ProjectLocationSetIterator	An iterator to a project location set.
ProjectPosition	ProjectPosition is a class used to represent a geographical offset and rotation. It can be used to represent the position of a project.
PropertyLine	Represents kinds of PropertyLines.
PropertySetElement	An element that groups together a set of related parameters.
RadialArray	An object that represents an Array created along a circle arc within the Revit project.
RadialDimension	An object that represents an Radial Dimension within the Revit project.
Rectangle	Stores a set of four integers that represent the left, top, right and bottom of a rectangle.
Reference	A stable reference to a geometric object in a Revit model.
ReferenceableViewUtils	Utilities related to reference views such as reference sections and reference callouts.
ReferenceArray	An array that contains reference objects.
ReferenceArrayArray	An array that contains ReferenceArray objects.
ReferenceArrayArrayIterator	An iterator to a ReferenceArray array.
ReferenceArrayIterator	An iterator to a reference array.
ReferenceIntersector	A class used to find and return elements that intersect a ray created from an origin point and direction.
ReferencePlane	Represents a reference plane of Autodesk Revit.
ReferencePoint	A reference point in an Autodesk Revit family.
ReferencePointArray	An array that contains reference objects.
ReferencePointArrayIterator	An iterator to a reference array.
ReferenceWithContext	An object including a reference to a geometric object and related context, as instance transform etc.
RelinquishedItems	List of elements and worksets that were relinquished by the current user.
RelinquishOptions	Options to control behavior of relinquishing ownership of elements and worksets.
ReloadLatestOptions	Options to control behavior of pure reload latest (not part of synchronize with central).
ReloadSwapOutInfo	This object contains information about fabrication parts swapped out during reload.
RenderingImageExposureSettings	Represents the exposure settings of rendering.
RenderingQualitySettings	Represents the quality settings of rendering.
RenderingSettings	Represents the rendering settings for a 3d view.
RenderNode	This is the base class of all render nodes in a model-exporting process.
RepeaterBounds	Represents bounds of the array of repeating references in 0, 1, or 2 dimensions. (See RepeatingReferenceSource ).
RepeaterCoordinates	Represents coordinates in the array of repeating references in 0, 1, or 2 dimensions.
RepeatingReferenceSource	Represents a collection of repeating references.
Revision	Represents a single revision in the project.
RevisionCloud	A RevisionCloud is a graphical "cloud" that can be displayed on a view or sheet to indicate where revisions in the model have occurred.
RevisionNumberingSequence	Defines the sequences by which numbers are assigned to Revisions.
RevisionSettings	Provides access to project-wide settings related to revisions.
RevitLinkGraphicsSettings	Settings to override display of Revit link in a view.
RevitLinkInstance	Represents an instance of a RevitLinkType.
RevitLinkOperations	This class is used to extend the IExternalResourceServer interface with methods to support operations specifically related to Revit links.
RevitLinkOptions	This class contains the options in use when creating or loading a Revit link.
RevitLinkType	This class represents another Revit Document ("link") brought into the current one ("host").
Revolution	A revolution solid or void form.
RevolvedFace	A revolved face of a 3d solid or open shell.
RevolvedSurface	A surface of revolution defined by a profile curve and a local coordinate system. The surface is obtained by rotating the curve around Z axis of the local coordinate system.
RoofBase	Represents all kinds of Roofs.
RoofType	Represents a specific type of roof.
RoutingCondition	RoutingCondition represents routing information that is used as input when determining if a routing criterion, such as minimum or maximum diameter, is met.
RoutingConditions	RoutingConditions contain routing information that is used as input when determining if a routing criterion, such as minimum or maximum diameter, is met.
RoutingCriterionBase	RoutingCriteriaBase is the base class for all routing criteria.
RoutingPreferenceManager	Manages default pipe segments, fittings, and selection criteria for a given MEPCurveType
RoutingPreferenceRule	A class representing a rule set in MEP routing preferences.
RPCNode	This class represents an RPC content in a model-exporting process.
RuledFace	A ruled face of a 3d solid or open shell.
RuledSurface	A ruled surface is created by sweeping a line between two profile curves or between a curve and a point (a point and a curve). Input curve(s) must be bounded or have natural bounds.
SATExportOptions	The export options used by exporting SAT format file. So far, there is no option in it.
SATImportOptions	The import options used to import SAT format files.
SaveAsOptions	This class contains options available for saving a document to disk with a new filename.
SaveOptions	This class contains options available for saving a document to disk.
SchedulableField	A non-calculated field eligible to be included in a schedule.
ScheduleDefinition	Settings that define the contents of a schedule.
ScheduleField	A field in a schedule.
ScheduleFieldId	The ScheduleFieldId object is used as a unique identification for a field in a schedule.
ScheduleFilter	A filter in a schedule.
ScheduleHeightsOnSheet	Heights information of a schedule on sheet.
ScheduleSheetInstance	An element that represents a particular placement of a schedule on a sheet.
ScheduleSortGroupField	A field that is used for sorting and/or grouping in a schedule.
Segment	This element represents a segment of an MEP curve object.
SelectionFilterElement	A filter element that stores an explicit list of ElementIds. Only elements whose ElementIds are in this list will pass the filter.
ServerPath	This class represents a path to a Revit Server location, rather than a location on disk or a network drive.
Settings	The settings object provides access to general components of the Autodesk Revit application, such as Categories.
ShapeBuilder	The base class for geometry builder classes.
ShapeImporter	A utility class that supports conversion of geometry stored in an external format into a Revit geometry objects.
SharedParameterApplicableRule	Tests whether an element supports a shared parameter.
SharedParameterElement	An element that stores the definition of a shared parameter which is loaded into the document.
SheetCollection	This class represents a sheet collection in Autodesk Revit.
SiteLocation	Contains the geographical location information for the project's site.
Sketch	Provides access to the Sketch in Autodesk Revit.
SketchBase	Provides access to the SketchBase in Autodesk Revit.
SketchEditScope	A SketchEditScope allows an application to create and maintain an editing session for a Sketch.
SketchedStairsCurveData	Sketched run/landing curves overrides with height and slope
SketchPlane	Represents a sketch plane or work plane.
SKPImportOptions	The import options used to import SKP format files.
SkyBackgroundSettings	Represents the rendering sky background settings.
SlabEdge	An object that represents a slab edge within the Autodesk Revit project.
SlabEdgeType	An object that represents the slab edge type in Autodesk Revit.
SlabShapeCrease	Represents a crease of a slab shape edited element.
SlabShapeCreaseArray	An array that can contain any number of creases used in Slab Shape Editing.
SlabShapeCreaseArrayIterator	An iterator to an array of creases used for Slab Shape Editing.
SlabShapeEditor	An object used for Slab Shape Editing.
SlabShapeVertex	Represents a vertex of a slab shape edited element.
SlabShapeVertexArray	An array that can contain any number of vertices used in Slab Shape Editing.
SlabShapeVertexArrayIterator	An iterator to an array of vertices used for Slab Shape Editing.
Solid	A 3d solid.
SolidCurveIntersection	This class represents the results of a calculation of intersection between a solid volume and a curve.
SolidCurveIntersectionOptions	This class contains the options used to calculate the intersection between a solid and a curve.
SolidGeometryOptions	A class containing optional information to control the geometry generation of the Solid by the SolidUtils routines.
SolidOptions	A class containing optional information to control the properties of the Solid generated by the GeometryCreationUtilities routines.
SolidOrShellTessellationControls	Controls various aspects of the triangulation produced by [!:SolidUtils::tessellateSolidOrShell()] method.
SolidSolidCutUtils	Exposes utilities which can cause one solid to cut another.
SolidUtils	Contains utility functions for solid operations.
SpacingRule	A rule for specifying a set of equidistant, parallel gridlines within a region.
SpanDirectionSymbol	Represents an instance of a Span Direction Symbol in Autodesk Revit.
SpatialElement	Represents an enclosed area or volume in the Revit model.
SpatialElementBoundaryOptions	Options that can be passed to a SpatialElementBoundaryCalculator to influence the results of the calculation.
SpatialElementBoundarySubface	SpatialElementBoundarySubface represents the geometry boundary information of spatial element.
SpatialElementCalculationLocation	The Spatial Element Calculation Location is used to specify the room/space where an element should be considered as placed.
SpatialElementCalculationPoint	SpatialElementCalculationPoint is used as the search point for family instances placement inside rooms and spaces.
SpatialElementDomainData	A base class for specific domain requirements for a spatial element.
SpatialElementFromToCalculationPoints	SpatialElementFromToCalculationPoints is used to specify the search points for a family instance which connects two rooms or spaces, such as a door or window. The points determine which room or space is considered the "from" and which is considered the "to".
SpatialElementGeometryCalculator	Use this class to calculate the geometry of a spatial element and obtain the relationships between the geometry and the element's boundary elements.
SpatialElementGeometryResults	The results of spatial element geometry calculation.
SpatialElementTag	A tag attached to a SpatialElement (room, space or area) in Autodesk Revit.
SpecTypeId	This class contains constants identifying specs.
SpecTypeId.Boolean	This class contains constants identifying Boolean specs.
SpecTypeId.Int	This class contains constants identifying integer specs.
SpecTypeId.Reference	This class contains constants identifying reference specs.
SpecTypeId.String	This class contains constants identifying string specs.
SpecUtils	A utility class of functions related to specs. A spec describes a data type that parameters can hold.
SpotDimension	Object representing various types of SpotDimension
SpotDimensionType	A type element containing the properties of a spot elevation.
SSEPointVisibilitySettings	Represents the settings contained in the document associated to the point display of Floor, Roof and Toposolid. for serialization public api methods
StairsEditScope	StairsEditScope allows user to maintain a stairs-editing session.
StartingViewSettings	The initial view settings for a document dictate which view will initially be open when this model is opened. These settings are available for all Revit project documents.
StdPostedWarning	Support for Reviewable Warnings sent from AddOn.
STEPExportOptions	The export options used by exporting STEP format file.
STEPImportOptions	The import options used to import STEP format files.
STLExportOptions	The export options used by exporting STL format file.
STLImportOptions	The import options used to import STL format files.
StringParameterValue	A class that holds a String value of a parameter element.
StructuralAsset	Represents the properties of a material pertinent to structural analysis.
Subelement	An object that represents an element or a subelement within the Autodesk Revit project.
SubTransaction	Sub-transactions are objects that provide control over a subset of changes in a document.
SunAndShadowSettings	The SunAndShadowSettings class represents the sun control.
Surface	A mathematical representation of a surface.
Sweep	A sweep solid or void form.
SweepProfile	Represents a profile for sweep or swept blend elements.
SweptBlend	A swept blend solid or void form.
SweptProfile	Represents an extruded profile swept along a driving curve.
SymbolGeometryId	This class is used to identify a piece of geometry managed by a symbol element.
SymbolicCurve	A curve that provides information but is not intended to represent actual geometry in an element.
SymbolicCurveArray	An array that contains model curves.
SymbolicCurveArrayIterator	An iterator to a model curve array.
SymbolTypeId	This class contains constants identifying symbols.
SynchronizeWithCentralOptions	Options to control behavior of synchronization with central.
TableCellCalculatedValueData	The TableCellCalculatedValueData stores the data for calculated value
TableCellCombinedParameterData	The TableCellCombinedParameterData stores the data for combined parameters
TableCellStyle	The TableCellStyle class contains the appearance settings for a given table cell, column, or table.
TableCellStyleOverrideOptions	This helper class represents the overridden characteristics of the associated cell.
TableData	The TableData class is implemented to hold most of the data that describe the style of the rows, columns, and cells in a table.
TableMergedCell	The TableMergedCell class defines a merged area of the upper-left and lower-right of a table grid.
TableSectionData	The TableSectionData class represents a serialized version of an instance of section table data. The class holds row, column and cell data.
TableView	This represents a view that shows a table. Most of the layout data for the table is contained in the TableData class.
TemporaryGraphicsManager	A class that provides functionality to create temporary graphics in a Revit model.
TemporaryViewModes	A data structure containing data related to temporary view modes.
TessellatedBuildIssue	Types of issues encountered while constructing geometrical objects from the tessellated face sets.
TessellatedFace	Defines a planar face bounded by a polyline in 3d space. A face consists of a single connected component and can have holes.
TessellatedShapeBuilder	A class that permits structured building of geometry or a mesh from a collection of connected faces. Contains all closed face sets and custom precisions.
TessellatedShapeBuilderResult	Describes what TessellatedShapeBuilder has construct.
TextElement	Base class representing text elements in Revit.
TextElementType	An object that represents a text style.
TextNode	This class represents a text annotation object in a model-exporting process.
TextNote	A class representing text note annotations in Revit.
TextNoteOptions	Options to use when creating a new text note element.
TextNoteType	An object that represents a text note style.
TextRange	An object that is used to identify a range of characters in a FormattedText .
ThermalAsset	Represents the properties of a material pertinent to energy analysis.
ThermalProperties	Class specific to thermal properties for assembly types, such as Wall, Floor, Ceiling, Roof and Building Pad.
TilePattern	An object representing a tile pattern that may be applied to a DividedSurface.
TilePatterns	The TilePatterns object is an interface for retrieving the TilePattern objects within the Document.
Toposolid	An object that represents a Toposolid within the Autodesk Revit project.
ToposolidType	An object that specifies the type of a Toposolid in Autodesk Revit.
Transaction	Transactions are context-like objects that guard any changes made to a Revit model
TransactionGroup	Transaction groups aggregate a number of transactions.
TransactWithCentralOptions	Options to customize Revit behavior when accessing the central model.
Transform	A transformation of the affine 3-space.
Transform1D	An affine transform of 1D Euclidean space.
Transform2D	An affine transform of 2D Euclidean space.
TransformWithBoundary	This class contains the transform from model space to projection space for a view and the boundary in model space in which the transform is valid.
TransmissionData	A class representing information on all external file references in a document.
TriangleInShellComponent	This class represents a triangle in a TriangulatedShellComponent object. The triangle is defined by its vertices, which are specified by their indices in the TriangulatedShellComponent's array of vertices.
TriangulatedShellComponent	This class represents a triangulated boundary component of a solid or a triangulated connected component of a shell.
TriangulatedSolidOrShell	This class represents a triangulated solid or shell.
TriangulationInterface	This abstract class provides an interface for querying a triangulation structure (vertices and triangles).
TriangulationInterfaceForTriangulatedShellComponent	This class is used to call FacetingUtils::convertTrianglesToQuads with a triangulation defined by a TriangulatedShellComponent.
TriangulationInterfaceForTriangulatedSolidOrShell	This class is used to call FacetingUtils::convertTrianglesToQuads with a triangulation defined by a TriangulatedSolidOrShell.
TriOrQuadFacet	This class represents a triangle or quadrilateral in a faceted structure.
TypeBinding	TypeBinding objects are used to bind a property to a Revit type, such as a wall type.
UnitFormatUtils	A utility class for formatting and parsing numbers with units.
Units	A document's default settings for formatting numbers with units.
UnitTypeId	This class contains constants identifying units of measurement.
UnitUtils	A utility class of functions related to units.
UpdaterData	Service class that is passed to an Updater to prove access to update execution context
UpdaterId	A unique identifier of an Updater
UpdaterInfo	Information of an updater, such as: Name, AdditionalInformation, name of the application that owns the updater, etc.
UpdaterRegistry	An object that stores and manages all updaters registered in the current session.
UV	Object representing coordinates in 2-dimensional space.
ValidateCurveLoopsOptions	Options for array of curve loops validation.
ValueAtPointBase	A base class representing storage of values at a given point.
ValueParsingOptions	Options for parsing strings into numbers with units.
VertexIndexPair	Represents a connection between vertices in the top and bottom profile of a blend.
VertexIndexPairArray	An array that contains VertexIndex pairs.
VertexIndexPairArrayIterator	An iterator to an array of VertexIndex pairs.
VertexPair	Indices of a pair of vertices in two CurveLoops(one vertex in each loop).
View	Base class for all types of views in Autodesk Revit.
View3D	Class for 3D views
ViewCropRegionShapeManager	A class that provides access to settings related to the crop assigned to a view or a reference callout.
ViewDisplayBackground	Set of values that control how background is drawn in a view. Background can only be set for a 3d view or for a section or elevation view.
ViewDisplayDepthCueing	Represents the settings for depth cueing.
ViewDisplayModel	Represents the settings for displaying model graphics. version 2: m_showHiddenLines type changed bool -> ShowHiddenLinesValues::Enum
ViewDisplaySketchyLines	Represents the settings for sketchy lines.
ViewDrafting	ViewDrafting represents a drafting view within the model.
ViewFamilyType	Represents a type of a Revit view.
ViewNavigationToolSettings	Represents the settings contained in the document associated to the View Navigation tools (such as the View Cube).
ViewNode	A render node that represents a view.
ViewOrientation3D	Container for the point and vectors which define View3D's orientation.
ViewPlan	Represents floor plan, area plan, ceiling plan, and structural plan views in Revit.
Viewport	An element that establishes the placement of a view on a sheet.
ViewSchedule	A schedule view.
ViewScheduleExportOptions	The export options used to export schedule views.
ViewSection	ViewSection covers sections, details, elevations, and callouts, all in their reference and non-reference variations.
ViewSet	A set that contains views.
ViewSetIterator	An iterator to a view set.
ViewShapeBuilder	Builds and verifies a view-specific shape representation that would typically be stored in a DirectShape object. Currently limited to curve-based representations for plan and elevation views.
ViewSheet	Class for ViewSheet
ViewSheetSet	Represents ViewSheetSets stored in a document. ViewSheetSets can be stored so that the same printing task can be executed multiple times.
ViewSheetSetting	Represents the View/Sheet Set (Application Menu->Print) within Autodesk Revit.
VisibleInViewFilter	A quick filter that passes elements that are most likely visible in the given view.
Wall	Represents a wall in Autodesk Revit.
WallFoundation	An object that represents a wall foundation element.
WallFoundationType	An object that represents the type of a wall foundation in Autodesk Revit.
WallSweep	Represents a wall sweep or reveal.
WallSweepInfo	Represents a wall sweep or reveal of a vertically compound structure.
WallType	Represents a specific type of wall, such as 'Generic - 8"'.
WallUtils	General Wall utility methods
WireframeBuilder	Constructs a shape representation consisting of points and curves. That shape would typically be stored in a DirectShape or a DirectShapeType object.
Workset	Represents a workset in the document.
WorksetConfiguration	A configuration class that is passed in to methods that open Revit documents to specify which user-created worksets are opened/closed.
WorksetDefaultVisibilitySettings	An object that manages default visibility of worksets in a document.
WorksetFilter	A base class for a type of filter that accepts or rejects worksets based upon criteria.
WorksetId	WorksetId identifies a workset within a single document.
WorksetKindFilter	A filter used to match worksets of the given WorksetKind.
WorksetPreview	Represents an accessor for workset data which can be obtained from an unopened document.
WorksetTable	A table containing references to all the worksets contained in a document.
WorksharingDisplayGraphicSettings	Represents the graphical settings that can be assigned to elements in the worksharing display modes.
WorksharingDisplaySettings	WorksharingDisplaySettings controls how elements will appear when they are displayed in any of the worksharing display modes.
WorksharingSaveAsOptions	This class contains options specific to worksharing SaveAs.
WorksharingTooltipInfo	Worksharing information about a single element suitable for display in an in-canvas tooltip.
WorksharingUtils	A static class that contains utility functions related to worksharing.
XYZ	Object representing coordinates in 3-dimensional space.

Name	Description
GridNode	A structure that represents a particular location in (U,V) from a grid.

Name	Description
ICentralLockedCallback	An interface that may be used to control Revit's behavior when it tries to lock central and is blocked because another user already has locked central.
IConnector	An interface which provides access to connector in Autodesk Revit MEP document.
ICustomFieldProperties	Represents the base class for the properties of a custom field.
IDataConversionMonitor	A base class for an application-specific logger. It should be used to track errors during conversion and/or , track conversion progress, cancel a conversion process if necessary. Implementing a logger class is optional, but highly recommended for all but most basic data converters. The base class is UI- and language-independent. It is up to the using app to implement UI. Language-specifc data may be used to communicate information to application users. English should be used to communicate data of interest to Revit development.
IDuplicateTypeNamesHandler	An interface for custom handlers of duplicate type names encountered during a paste operation. When the destination document contains types that have the same names as the types being copied, but different internals, a decision must be made on how to proceed - whether to cancel the operation or continue, but only copy types with unique names.
IExportContext	An interface that is used in custom export to process a Revit model.
IExportContext2D	An interface that is used in custom export to export 2D views of a Revit model.
IExportContextBase	An interface that as common base for IModelExportContext and IExportContext2D.
IExtension	An interface that supports the additional operation for Extension Status
IExternalDBApplication	An interface that supports addition of DB-level external applications to Revit, to subscribe to DB-level events and updaters.
IExternalResourceServer	The interface used to provide custom implementation to provide access to external resources (such as linked files) from arbitrary locations.
IFailuresPreprocessor	An interface that may be used to perform a preprocessing step to either filter out anticipated transaction failures or to mark certain failures as non-continuable.
IFailuresProcessor	To create your own UI or fully automated tool to process Revit Failures, derive a class from this interface.
IFamilyLoadOptions	An interface class which provide the callback for family load options.
IGetLocalPathForOpenCallback	The interface used to provide custom support for the "Open (and Unload)" command for Revit Links obtained as external resources.
IModelExportContext	An interface that is used in custom export to export 3D views of a Revit model.
INavisworksExporter	The interface used to implement a Navisworks exporter.
IOnLocalLinkSharedCoordinatesSavedCallback	A callback for notifying an IExternalResourceServer that shared coordinates changes have been saved back to one of the Revit or DWG links provided by that server.
IOpenFromCloudCallback	An interface that may be used to control Revit's behavior when opening a cloud model.
IPerformanceAdviserRule	Base class to derive specific performance adviser rules from.
IPhotoRenderContext	An interface that is used in custom export to render 3D views of a Revit model.
IPrintSetting	An interface which represents the Print Setup (Application Menu->Print->Print Setup) within Autodesk Revit.
ISaveSharedCoordinatesCallback	An interface that may be used to control Revit when trying to unload or reload a Revit link with changes in shared coordinates.
ISaveSharedCoordinatesCallbackForUnloadLocally	An interface that is used to control Revit when trying to unload locally a Revit link with changes in shared coordinates.
ITransactionFinalizer	An interface that may be used to perform a custom action at the end of a transaction. A method of the interface will be called when a transaction is either committed or rolled back.
ITransientElementMaker	The interface to be implemented by an application that creates transient element(s) in Revit.
IUpdater	The interface used to create an updater capable of reacting to changes in the Revit model.
IViewSheetSet	This interface represents a selected set of views/sheets which will be used for printing.

Name	Description
ACADVersion	An enumerated type listing available AutoCAD versions, into which a file may be exported.
ACAObjectPreference	An enumerated type listing possible ways to generate geometry of an ACA object Revit object parameters used to generate geometry of the exported ACA object. Revit object geometry is used to generate geometry of the exported ACA object. That may produce better geometric fidelity in some cases.
AdaptivePointConstraintType	An enumerated type containing possible constraint types for Adaptive Points.
AdaptivePointOrientationType	An enumerated type containing possible orientation types for Adaptive Points.
AdaptivePointType	An enumerated type containing possible types for Adaptive Points.
AllowedValues	A range of allowed values.
AlternateUnits	An enumerated type listing the locations where Alternate units may be displayed in dimensions.
AnalyzesAsType	This enum class is used for the BuiltInParameter STRUCTURAL_ANALYZES_AS.
AreaElemType	An enumerated type to store type of AreaElement.
ArrayAnchorMember	Represents the possible choices for how the translation or rotation is used to place each member of the array.
AssemblyDetailViewOrientation	Orientation of the Assembly Detail View.
AttachmentType	Enum determining whether a link is an attachment or an overlay
AutomaticConnectionBehaviorType	Defines behavior of connector with respect to automatic creation of connections
BackClippingParam	The allowed values for the VIEW_BACK_CLIPPING and VIEWER_BOUND_FAR_CLIPPING parameters.
BackgroundImageFit	Indicates the background image fit type in rendering settings.
BackgroundStyle	Indicates the background style in rendering settings.
BaseLoadOn	An enumerated type listing all the possible power load use types for a space object.
BeamSystemJustifyType	Describes the justify method of beamsystem.
BehaviorType	An enumerated type listing all the behavior type for MEP Components.
BendingDetailPositionOptions	An enumerated type listing the bending detail position options supported by the Bending Detail.
BooleanOperationsType	An enumerated type listing boolean types that are supported for boolean operation.
BorderTile	Options for controlling tiles that overlap the face boundary. See DividedSurface .
BoxPlacement	An enumerated type containing possible constraint types for Adaptive Points.
BRepBuilderOutcome	This class defines possible outcomes returned by BRepBuilder functions that need to report outcome via a return value.
BRepBuilderState	This class defines an enumerative type used to specify the state of a BRepBuilder object.
BRepType	This class defines an enumerative type used to specify the type of output geometry expected from a BRepBuilder.
BrowserOrganizationType	Enumerated type representing the type of browser organization.
BuildingType	This enumeration is used for specifying the most predominant building use type.
BuiltInCategory	A list of all the built in categories within Revit.
BuiltInParameter	An enumerated type listing all of the built-in parameter IDs supported by Autodesk Revit.
CategoryType	The type of category.
CellType	Declares the cell data type.
ChangePriority	Enum used to specify the priority of an Updater during execution.
CheckoutStatus	Indicates the ownership status of an element
ColorDepthType	An enumerated type listing all Color Depth types of Print Setting.
ColumnAttachmentCutStyle	Control the handling of columns that intersect their targets.
ColumnAttachmentJustification	Control the column extent in cases where the target is not a uniform height.
ComponentRotation	ComponentRotation property of DividedSurface. See DividedSurface .
CompoundStructureError	When CompoundStructure::isValid() returns false, it uses these values to indicate precise nature of defect.
ConnectionResolution	An enumerated type listing all the possible resolutions for connectivity validation.
ConnectionWarning	An enumerated type listing all the reasons for connectivity failure.
ConnectorDomainType	Type of connector domain.
ConnectorGenderType	Connector gender type enum
ConnectorJointType	Connector joint type enum
ConnectorProfileType	An enumerated type listing all connector profile types
ConnectorType	An enumerated type listing all connector types for a connection
ContourSettingItemType	The type of a ContourSettingItem
ControlShape	An enumerated type listing four shapes of control that Autodesk Revit supports.
CoordinatePlaneVisibility	Visibility settings for ReferencePoint element's coordinate reference planes.
CurtainGridAlignType	An enumerated to list CurtainGrid patterns.
CurvedEdgeConditionParam	The allowed values for the HOST_SSE_CURVED_EDGE_CONDITION_PARAM parameter.
CurveElementType	An enumerated type listing the curve element types that can be used when filtering elements (via CurveElementFilter).
CurveProjectionType	This attribute indicates how the curve will be projected to the surface if the curve is sketched on the surface.
CustomSubCategoryId	An enumerated type listing pseudo sub-categories that can appear in a mapping template. These types do not represent an independent category in Revit, but can be mapped to specific IFC entity.
CutFailureReason	The reason why a solid-solid cut cannot be created.
DataExchangeMessageId	Predefined message ids for DataExchangeLog.
DataExchangeMessageSeverity	Error levels for DataExchangeLog
DataExchangeMessageVerbosity	Predefined verbosity levels for DataExchangeLog
DatumEnds	An enumerated type representing ends of a datum plane.
DatumExtentType	Represents the type of datum extent that is displayed in a particular view.
DecimalSymbol	The symbol used to separate the integer and fractional parts of a number.
DeleteWorksetOption	This class defines an enumerative type used to specify the option to delete a workset.
DetachFromCentralOption	Options for workset detachment behavior.
DGNFileFormat	An enumerated type listing available Microstation versions into which a file may be exported.
DigitGroupingAmount	The number of digits in each group when numbers are formatted with digit grouping.
DigitGroupingSymbol	The symbol used to separate groups of digits when numbers are formatted with digit grouping.
DimensionShape	An enumerated type to list dimension type.
DimensionStyleType	An enumerated type containing possible style types of dimensions.
DirectShapeReferencingOption	An enumerated type containing possible referencing options for DirectShapes.
DirectShapeRoomBoundingOption	An enumerated type containing possible room bounding settings for DirectShapes.
DirectShapeTargetViewType	View types for which DirectShape objects are allowed to have alternative shape representations
DirectShapeTypeUserAssignability	Options for a DirectShapeType which affect whether or not it can be assigned as the type of a DirectShape.
DisplacementPathStyle	Used to control the graphical representation of a DisplacementPath element.
DisplayStyle	Display type of the view.
DisplayUnit	Describes the type of Revit display unit, metric or imperial.
DistanceMeasuredFrom	Indicates if the distance is measured from the top or bottom of the wall.
DistributionOfNormals	An enumeration containing the choices of how normal vectors are assigned and distributed along the surface of a polymesh. Planar faces would typically have only normal vector associated, but curved faces can have a different normal either for each facet (triangle) or each point of the tessellated polymesh.
DividedPathMeasurementType	DividedPath measurement type.
DocumentType	Types of Revit documents.
Domain	Type of connector domain.
DoorEvacuationExitType	An enumerated type listing the possible door evacuation types
DrawLayer	An enumerated type containing possible DrawLayer options.
DuplicateTypeAction	This enumerated type defines the action to be taken when there are types with the same name being pasted.
DWFImageFormat	An enumerated type listing possible image format for DWF Export.
DWFImageQuality	An enumerated type listing possible image quality for DWF Export.
EaveCutterType	An enumerated type to store type of EaveCutter.
ElementOnPhaseStatus	The statuses that an element can have with respect to a given phase.
ElementReferenceType	Element reference types.
ElementTypeGroup	The element type group.
EndCapCondition	Used by CompoundStructure to describe which shell layers participate in end wrapping.
EntryAndSchemeConsistency	Enumeration used to specify why an entry is inconsistent with a scheme or another entry.
ExportColorMode	An enumerated type listing export color mode.
ExportColumnHeaders	Options for exporting column headers in schedule view export.
ExportEnergyModelType	This enum is used to define if energy model used for gbXML export should be based on rooms/spaces, building elements or analysis mode in EnergyDataSettings.
ExportPaperFormat	Paper formats supported by export
ExportRange	This enum is used to define what view, part of the view, or list of views will be exported.
ExportResolution	An enumerated type listing possible options to control the tessellation quality.
ExportSheetType	An enumerated type listing possible Sheet type.
ExportTextQualifier	Options for the text qualifier character in schedule view export.
ExportUnit	An enumerated type listing possible target units for CAD Export.
ExternalDBApplicationResult	Informs Autodesk Revit of the status of your external db application after execution.
ExternalFileReferenceType	Enum class indicating kinds of external file references
ExternallyTaggedNonBRepUsage	The ways in which an ExternallyTaggedNonBRep can be used in Revit.
ExternalResourceLoadStatus	A flag to indicate the status of an ExternalResource load request.
ExternalResourceUIBrowseResultType	Describes the type of external resource browsing result.
ExtrusionAnalyzerFaceAlignment	Indicates whether a face of the solid analyzed by ExtrusionAnalyzer is fully aligned, partially aligned, or unaligned with faces of the extrusion.
FabricationDimensionType	Fabrication dimension type.
FabricationDimensionUnitType	Fabrication dimension unit type.
FabricationMaterialType	An enumerated type listing all fabrication material types.
FaceIntersectionFaceResult	An enumerated type listing the possible results of a face-face intersection calculation.
FailureProcessingResult	An enumerated type representing the result achieved by any of the available types of failure handlers: FailuresPreprocessor, the handler of FailuresProcessing event or a FailuresProcessor.
FailureResolutionType	Enumeration to classify FailureResolutions by nature of operation they perform on failing Elements.
FailureSeverity	Enum represents severity of a failure.
FamilyElementVisibilityType	Indicates the Visibility type of generic forms.
FamilyHostingBehavior	Types of hosts into/onto which a family can be hosted. For informative purposes only. Does not affect anything in Revit!
FamilyInstanceReferenceType	Corresponds to the possible values of parameter "Is Reference" of reference planes and parameter "Reference" of reference lines in families. This enum is used to identify references of family instances corresponding to reference planes and reference lines in the family.
FamilyNestingBehavior	This attribute describes the family nesting behavior.
FamilyPlacementType	The type of placement required for a given family.
FamilySizeTableErrorType	The set of errors that can be returned when importing a FamilySizeTable from a CSV file.
FamilySource	Describes which version of the family to be loaded.
FillPatternHostOrientation	The types of orientations for fill patterns.
FillPatternTarget	The type of the fill pattern.
FindReferenceTarget	The type of reference to find from a ReferenceIntersector.
FitDirectionType	This enum is used to define the direction to fit the number of pixels defined by PixelSize.
FittingAndAccessoryCalculationType	The MEP fitting and accessory pressure drop calculation type.
FittingAngleUsage	An enumerated type representing the options for how to limit the angle values applicable to fitting content.
FloorFace	An enumerated type listing floor face types (top or bottom)
FlowDirectionType	An enumerated type listing direction types for a connector.
FormatStatus	An enumerated type indicating the formatting status of a range of characters in FormattedText
FramingShapeClassification	This enumeration is used to classify MEP Ancillary Framing shape.
GraphicsStyleType	Describes the type of graphics style.
GridNodeLocation	Location of a grid node relative to the face boundary. See DividedSurface .
GridSegmentDirection	Specify one of the four adjacent segments to a GridNode. See DividedSurface .
HiddenLineViewsType	An enumerated type listing all Hidden Line Views types of Print Setting.
HorizontalAlign	Horizontal alignment of model text.
HorizontalAlignmentStyle	Declares the horizontal alignment style of font.
HorizontalTextAlignment	Supported types of horizontal alignment of a text element and text justification within the text containing box.
IFCExportElement	An enumerated type defining if an element is exported to IFC or not.
IFCExportElementType	An enumerated type defining if an element type is exported to IFC or not.
IFCVersion	An enumerated type listing available IFC file versions into which a file may be exported.
ImageFileType	This enum is used to define exported file type.
ImageResolution	This enum is used to define image resolution in order to calculate the image size.
ImageTypeSource	The source of the data used to generate the image.
ImageTypeStatus	Indicates the current state of the contents of the ImageType.
ImportColorMode	An enumerated type listing how colors are handled in an import process.
ImportExportFileFormat	Describes formats supported by import / export.
ImportPlacement	An enumerated type listing possible placement modes for imported drawings.
ImportUnit	An enumerated type listing possible target units for CAD Import.
InsertOrientation	The allowed values for the INSERT_ORIENTATION parameter.
IntersectionType	Intersection type.
JoinType	The type of join at the end of an element. The join type affects only the graphic treatment, i.e. cleaning of the end, not the physical join behavior.
JunctionType	An enumerated type listing all the junction types for MEP curve types.
KeyBasedTreeEntryErrorType	An Enum indicating the type of error associated with a KeyBasedTreeEntry.
LabelType	The label type in dimension equality formats.
LayerCategoryType	An enumerated type listing category types supported in an ExportLayerTable.
LeaderAtachement	Supported types of vertical attachments of a leader to a text note.
LeaderEndCondition	An enumerated type listing Leader end conditions that are supported for IndependentTags.
LeaderShape	Supported geometric shapes of annotation leaders.
LeadersPresentationMode	Leaders Presentation Mode.
LightAndMaterialAccuracyMode	An enumerated type containing possible Light and Material Accuracy modes for Raytracer render.
LightingSource	Indicates the lighting scheme type in rendering settings.
LinePatternSegmentType	Represents the type of a line pattern segment.
LineScaling	An enumerated type listing possible LineType scaling modes.
LinkedFileStatus	Enum displaying the loaded status of a linked file
LinkLoadResultType	Enum listing the possible results after loading a linked model.
LinkOriginFileType	Enum determining whether the source type of a temporary rvt link is an ifc.
LinkVisibility	Link visibility types.
ListType	An enumerated type indicating the style of list item for paragraphs that are part of ordered or unordered lists in FormattedText .
LoadOperationType	An enum indicating whether a resource load operation was triggered by a user action or an automatic process.
MarginType	An enumerated type listing all Margin types of Print Setting.
MassDisplayTemporaryOverrideType	This enum identifies the mass display overrides.
MaterialAspect	A list of all material aspects that a material can store PropertySetElements for.
MaterialFunctionAssignment	Used in class CompoundStructure to specify the function of a layer.
MaterialPropertyPathType	Enum class indicating kinds of paths which ExternalFileReferenceType.Material references can have.
MEPSystemClassification	This enumeration is used to classify MEP connectors and systems and drives certain behavior for a particular system type
MeshFromGeometryOperationIssue	Issues encountered while constructing meshes as fallbacks for geometrical operations.
ModelUpdatesStatus	Indicates whether an element in the current model has additional user changes in the central model.
ModifierType	An enumerated type listing options to appear in the exported layer name.
NavisworksCoordinates	An enumerated type listing possible Coordinates of Navisworks Exporter.
NavisworksExportScope	An enumerated type listing possible "Element Scopes" of Navisworks Exporter.
NavisworksParameters	An enumerated type listing possible "Parameter conversions" of Navisworks Exporter.
NumberSystemDisplayRule	The available options for display of numeric values in the number system.
NumberSystemJustifyOption	The available options for justification of the numbers in a number system.
OpenConflictResult	The result of the open conflict.
OpenConflictScenario	The kinds of conflicts happened during open.
OpenForeignOption	Options for opening files saved by an application that was not developed or licensed by Autodesk.
OpeningWrappingCondition	Used by CompoundStructure to describe which shell layers participate in wrapping at openings.
OrdinateDimensionLineStyle	The ordinate dimension line style.
OrdinateOriginVisibility	The ordinate origin visibility.
OrdinateTextOrientation	The ordinate dimension text orientation.
OrdinateTextPosition	The ordinate dimension text position.
OverridePermissions	Types of overrides that can be applied to a category.
PageOrientationType	An enumerated type listing all Page Orientation types of Print Setting
PaperPlacementType	An enumerated type listing all Paper Placement types of Print Setting.
ParametersOrder	The order of the parameters.
PartEdgeConditionOrientation	Relative orientation of the right/lower and left/upper edge condition profiles.
PartsVisibility	Indicates the visibility of parts for the view.
PartType	An enumerated type listing all MEP family part types. A part type typically provides one unique set of type parameters that defines this part.
PathType	Enum determining what kind of path a given external file reference path is. Paths are valid for all types of external file references unless otherwise specified.
PDFExportQualityType	An enumerated type listing the options for PDF export quality.
PhaseStatusPresentation	An enumerated type listing the options for element display in a phase filter.
PlanViewDirection	This enumerated type represents the possible directions for a plan view.
PlanViewPlane	Locations where view range offsets can be specified.
PlanViewRangeError	Describes errors in the location of planes in a PlanViewRange object.
PlanViewRangeLevel	An enumerated type representing the options for setting the range for a plan view.
PointCloudColorMode	Color mode of a point cloud or part of a point cloud
PointCloudFoundStatus	Enumerated type representing the possible states related to searching for a point cloud file.
PointOnCurveMeasureFrom	Point on curve MeasureFrom - It tells from which end of the host curve the point location is measured.
PointOnCurveMeasurementType	Point on curve measurement type Defines the types of measurements that may be used when placing a point at a designated distance along a curve.
PreferredJunctionType	Enumerated type representing the possible options for the preferred junction for a routine preference rule.
PreviewFamilyVisibilityMode	Modes that control visibility of family elements depending on the currently applied Element Visibility Settings of a view.
PrinterResolution	Controls the resolution level in rendering settings.
PrintRange	An enumerated type listing all Print Range types of Print.
ProfileFamilyUsage	An enumerated type listing all types of profile families.
ProfilePlaneLocation	Indicates the location of Sweep profile plane on the path curve.
PropOverrideMode	An enumerated type listing ways how overridden object styles get exported.
RasterQualityType	An enumerated type listing the options for raster quality.
RectangularGridSegmentOrientation	The orientation type of rectangular grid segment.
ReferenceBaseOnHostType	This enumeration is used to classify the Reference Base on Host type .
ReferenceType	Reference types of curve element.
RenderDuration	An enumerated type containing possible duration types to do Raytracer render.
RenderingQuality	Indicates the rendering quality in rendering settings.
RenderNodeAction	Enumerated actions for processing a render node during custom export.
ResolutionTarget	Indicates the resolution target(Screen or Printer) used for rendering settings.
ResourceVersionStatus	An enum indicating whether a resource is current or out of date.
RevisionNumbering	The options for how revision numbers should be displayed on sheets within a project.
RevisionNumberType	Determines how a particular revision will be numbered.
RevisionVisibility	Determines whether Revision Clouds and Revision Tags will be visible in the project.
RoundingMethod	Rounding methods
RoutingPreferenceErrorLevel	An enumerated type listing the options for posting errors or warnings when routing preferences are not satisfied.
RoutingPreferenceRuleGroupType	Add more rule group type here.
RowHeightOverrideOptions	Describes the options for overriding schedule body row heights (applied when viewed as a ScheduleSheetInstance on a ViewSheet).
SaveModifiedLinksOptions	Class giving options when saving linked files which have been modified in-memory by shared coordinates operations.
SaveModifiedLinksOptionsForUnloadLocally	Class giving options when saving linked files which are unloaded locally and have been modified in-memory by shared coordinates operations.
ScheduleFieldDisplayType	Display type of schedule field.
ScheduleFieldMultipleValuesDisplayType	Define how the schedule field's multiple value is displayed.
ScheduleFieldType	The type of data displayed in a schedule field.
ScheduleFilterType	Type of schedule filter.
ScheduleHeadingOrientation	Orientation of schedule heading.
ScheduleHorizontalAlignment	Horizontal alignment of data in a schedule.
ScheduleSortOrder	Options for sort order of rows in a schedule.
ScheduleVerticalAlignment	Vertical alignment of data in a schedule.
SectionType	Declares the section data type.
SelectionFilterAction	An enumerated type containing the type of actions that may be taken with a selection filter applied to a point cloud.
ServiceType	This enumeration is used for specifying the most predominant service for the building or space.
SetComparisonResult	An enumerated type listing all the relationship types between two sets of arbitrary nature.
ShapeImporterSourceFormat	An enumerated type listing the possible formats supported by the Shapeimporter.
SheetDuplicateOption	Options for duplicating sheets
ShellLayerType	Used to distinguish exterior and interior shell layers.
ShowHiddenLinesValues	Provides options for display of hidden lines in a given view.
SimpleWorksetConfiguration	Indicates the set of user-created worksets to open in memory
SlabShapeCreaseType	The type of a SlabShapeCrease
SlabShapeVertexType	The type of a SlabShapeVertex
SlantedOrVerticalColumnType	This enum class is used for the BuiltInParameter SLANTED_COLUMN_TYPE_PARAM.
SolidCurveIntersectionMode	Represents the types of results available for calculating the intersection between a solid and a curve.
SolidGeometry	An enumerated type listing possible ways of exporting solids in 3D views.
SortingOrder	Enumerated type representing the sorting order of a collection of objects.
SpacingRuleJustification	Justification property of spacing rule
SpacingRuleLayout	Rules for laying out a series of equidistant points or parallel lines
SpatialElementBoundaryLocation	An enumerated type listing boundary options of spatial element geometry calculation.
SpatialElementTagOrientation	An enumerated type listing tag orientation options that are supported by SpatialElementTags.
SpatialElementType	An enumerated type listing types of spaces.
SpecialType	An enumerated type listing special types that can appear in an ExportLayerTable . These types do not represent an independent category in Revit, but can be mapped to specific layers on export.
STEPApplicationProtocol	An enumeration for STEP Application Protocols.
StickSymbolLocation	Indicates the stick symbol location on the UI, which is used for the BuiltInParameter STRUCTURAL_STICK_SYMBOL_LOCATION.
StiffenerClassification	This enumeration is used to classify the stiffener.
StorageType	An enumerated type listing all of the internal parameter data storage types that Autodesk Revit supports.
StripedRowPattern	An enumerated type representing the possible sets of rows of a striped row schedule.
StructDeckEmbeddingType	Used in class CompoundStructure to specify the usage of a layer whose function is StructuralDeck.
StructuralAssetClass	Represents the type of material described by a structural asset. This enum value is returned by Autodesk::Revit::DB::StructuralAsset::StructuralAssetClass.
StructuralBehavior	Specifies whether structural elements behave orthotropically, isotropically, or transverse-isotropically.
StructuralReleaseType	Type of structural release, which is used for the BuiltIn parameter STRUCTURAL_END_RELEASE_TYPE.
SubfaceType	Meaning of a subface's type.
SunAndShadowType	Sun study type enum of SunAndShadowSettings.
SunStudyTimeInterval	Time interval enum for a single or multi-day sun study.
TagHeadAlignment	An enumerated type listing the tag-head alignment options supported by the Bending Detail.
TagHeadPositionOptions	An enumerated type listing the tag-head position options supported by the Bending Detail.
TagMode	The modes of tag creation that are supported for IndependentTags.
TagOrientation	An enumerated type listing tag orientation options that are supported by IndependentTags.
TagOrientationBehavior	This attribute describes the family orientation behavior.
TemporaryViewMode	Enumeration to represent the various temporary view modes a view can be in.
TessellatedBuildIssueType	Types of issues encountered while constructing geometrical objects from the tessellatted face sets.
TessellatedShapeBuilderFallback	Describes what TessellatedShapeBuilder function should do, if it cannot build a requested TessellatedShapeBuilderTarget .
TessellatedShapeBuilderOutcome	Describes the outcome of TessellatedShapeBuilder attempt to build geometrical objects.
TessellatedShapeBuilderTarget	Describes what TessellatedShapeBuilder should generate, if possible.
TextAlignFlags	An enumerated type listing all the Text align flags.
TextAlignMask	An enumerated type listing all the Text align mask.
TextBaselineStyle	Supported styles of text position relative to the normal baseline.
TextElementBackground	An enumerated type listing all the background mode for the built-in parameter TEXT_BACKGROUND.
TextListStyle	Supported styles of text list paragraphs.
TextNoteLeaderStyles	An enumerated type listing all the Leader styles.
TextNoteLeaderTypes	Types of text-note leaders
TextTreatment	An enumerated type listing possible text treatment modes.
ThermalMaterialType	Represents the thermal material type.
TilePatternsBuiltIn	Revit's built-in tile patterns. See TilePattern .
TransactionStatus	An enumerated type listing the possible statuses associated with a Transaction, TransactionGroup, or SubTransaction, or the result of a particular method call on one of those objects.
TransmittedModelOptions	Enum giving desired behavior when opening or saving a transmitted workshared model.
UnderlayOrientation	Indicates how elements in the underlay are viewed.
UnitSystem	A system of measurement: Metric or Imperial units.
UVGridlineType	A choice between U-gridlines or V-gridlines of a divided surface U Gridlines V Gridlines
ValueAtPointFlags	Enumerated type containing flags related to the display on particular points. Enumerated type that stores bit values of flags that can be set at any domain point.
VerticalAlignmentStyle	Declares the vertical alignment style of font.
VerticalTextAlignment	Supported types of vertical alignment of a text element.
ViewDetailLevel	Detail level of the view
ViewDiscipline	Discipline of the view
ViewDisplayBackgroundImageFlags	A collection of bit flags that control how the background image is positioned in relation to the crop region (or the view boundary).
ViewDisplayBackgroundType	A collection of settings defining the type of the view background
ViewDisplayEdges	A collection of settings defining how visible edges are displayed
ViewDuplicateOption	Options for duplicating views
ViewFamily	An enumerated type that corresponds to the type of a Revit view.
ViewPlacementOnSheetStatus	Indicates whether the View is placed on a Sheet.
ViewPlanType	An enumerated type listing plan view types.
ViewportPositioning	An enumerated type listing of viewport positioning options on the sheet when swapped to another view.
ViewportRotation	Rotation of the viewport
ViewTemplateApplicationOption	Options for applying view templates
ViewType	An enumerated type listing available view types.
VirtualPrinterType	An enumerated to list Virtual Printer Types in Revit.
Visibility	Describes the visibility of a particular geometry object.
WallCrossSection	The allowed values for the WALL_CROSS_SECTION parameter.
WallFunction	Indicates the function of a specified WallType, as specified in the parameter FUNCTION_PARAM on the WallType.
WallKind	Describes the fundamental type of wall, such as curtain wall or stacked wall.
WallLocationLine	This enumerated type represents the options for alignment of a wall's location line.
WallSide	Represents the possible sides of a wall where a sweep or reveal may be attached.
WallSweepOrientation	Represents the orientation of horizonally placed sweep's profile relative to the wall side face.
WallSweepType	Represents the possible types for methods affecting wall sweeps or reveals.
WidthMeasuredAt	The allowed values for the WALL_TYPE_WIDTH_MEASURED_AT parameter.
WorksetConfigurationOption	A collection of options used to initialize a WorksetConfiguration.
WorksetKind	Indicates one of the standard kinds of workset (as available in the UI).
WorksetVisibility	Indicates the visibility settings of a workset in a particular view.
WorksharingDisplayMode	Indicates which worksharing display mode a view is in.
ZoomFitType	This enum is used to define type of zoom.
ZoomType	An enumerated type listing all Zoom types of Print Setting.